The Old ROOT News

Production release 5.20/00

25/06/2008

The production release of ROOT 5.20/00 is now available. In case you are upgrading from version 5.14, 5.16 or 5.18, please read the releases notes of version 5.16 and 5.18 in addition to these notes. The SVN tag for this version is v5-20-00. Tar files for the source, documentation and binaries are available at: Version 5.20/00 Release Notes Full development notes (SVN logs) Download this version The AFS versions of 5.20/00 can be found at: /afs/cern.ch/sw/lcg/app/releases/ROOT/5.20.00/slc4_ia32_gcc34 /afs/cern.ch/sw/lcg/app/releases/ROOT/5.20.00/slc4_ia32_gcc34_dbg /afs/cern.ch/sw/lcg/app/releases/ROOT/5.20.00/slc4_amd64_gcc34 /afs/cern.ch/sw/lcg/app/releases/ROOT/5.20.00/slc4_amd64_gcc34_dbg /afs/cern.ch/sw/lcg/app/releases/ROOT/5.20.00/osx105_ia32_gcc401 /afs/cern.ch/sw/lcg/app/releases/ROOT/5.20.00/osx105_ia32_gcc401_dbg /afs/cern.ch/sw/lcg/app/releases/ROOT/5.20.00/win32_vc71_dbg /afs/cern.ch/sw/lcg/app/releases/ROOT/5.20.00/win32_vc9_dbg The new development version in SVN is 5.21/01. The documentation, release and development notes for this version are at: Version 5.21/01 Release Notes Full development notes (SVN logs) The next development release (will be version 5.21/02) is planned for August 28. The next production release (will be version 5.22/00) is planned for December 18.

Production release 5.18/00

17/01/2008

The production release of ROOT 5.18/00 is now available. In case you are upgrading from version 5.14, please read the releases notes of version 5.16 in addition to these notes. The SVN tag for this version is v5-18-00. Tar files for the source, documentation and binaries are available at: Version 5.18/00 Release Notes Full development notes (SVN logs) Download this version The AFS versions of 5.18/00 can be found at: /afs/cern.ch/sw/lcg/external/root/5.18.00/osx104_ia32_gcc401 /afs/cern.ch/sw/lcg/external/root/5.18.00/osx104_ia32_gcc401_dbg /afs/cern.ch/sw/lcg/external/root/5.18.00/slc4_amd64_gcc34 /afs/cern.ch/sw/lcg/external/root/5.18.00/slc4_amd64_gcc34_dbg /afs/cern.ch/sw/lcg/external/root/5.18.00/slc4_ia32_gcc34 /afs/cern.ch/sw/lcg/external/root/5.18.00/slc4_ia32_gcc34_dbg /afs/cern.ch/sw/lcg/external/root/5.18.00/win32_vc71_dbg The coming development version in SVN will be 5.19/01. The next development release (will be version 5.19/02) is planned for March 12. The next production release (will be version 5.20/00) is planned for June 25.

PROOF 2007 Workshop

31/10/2007

We are pleased to announce the topical workshop PROOF 2007 which will take place the 29th and 30th of November at CERN. The workshop is about how to use PROOF for LHC data analysis. The main workshop topics are: Dataset management User and resource scheduling Cluster hardware and configuration PROOF cluster monitoring and management Experiment analysis models and frameworks Missing features User feedback Please use the registration page if you are interested in attending.

ROOT has moved to Subversion

09/10/2007

Since September ROOT has moved to Subversion for version control. We have made the change because Subversion offers many benefits over CVS. Basically all large Open Source projects have preceded us in this move. For more details about the why, how and where see this presentation. A detailed Subversion HowTo has been added to the ROOT website. To ease the migration for the CVS head users we will be keeping the CVS head in sync with the Subversion trunk till the 1st of November. The CVS patch branches for v5-12 and v5-14 will be maintained and remain available in CVS (and of course also in Subversion). The ROOT developers are already exclusively working in Subversion and the CVS syncing is done via a Subversion hook script. However, for the developers to benefit fully of the new features of Subversion, we cannot keep this automatic syncing past the 1st of November.

ROOT 2007 Workshop video archives	02/07/2007
Thanks to Steven Goldfarb and Mitch McLachlan from ATLAS, you can view or download the video archives of all the talks.

Production Version 5.16/00

29/06/2007

The Production release of ROOT 5.16/00 is now available. The CVS tag for this version is v5-16-00. Tar files for the source, documentation and binaries are available at: Version 5.16/00 Release Notes Full development notes (CVS logs) Download this version The AFS versions of 5.16/00 can be found at: /afs/cern.ch/sw/lcg/external/root/5.16.00/osx104_ppc_gcc401/root for osx 10.4 gcc4.0.1 /afs/cern.ch/sw/lcg/external/root/5.16.00/slc3_ia32_gcc323/root for slc3 gcc3.2.3 /afs/cern.ch/sw/lcg/external/root/5.16.00/slc3_ia32_gcc323_dbg/root for slc3 gcc3.2.3/debug /afs/cern.ch/sw/lcg/external/root/5.16.00/slc4_ia32_gcc34/root for slc4 gcc3.4 /afs/cern.ch/sw/lcg/external/root/5.16.00/slc4_ia32_gcc34_dbg/root for slc4 gcc3.4/debug /afs/cern.ch/sw/lcg/external/root/5.16.00/slc4_amd64_gcc34/root for slc4 amd64 gcc3.4 /afs/cern.ch/sw/lcg/external/root/5.16.00/slc4_amd64_gcc34_dbg/root for slc4 amd64 gcc3.4/debug /afs/cern.ch/sw/lcg/external/root/5.16.00/win32_vc71_dbg/root for win32 msvc7.1/debug The next development release (will be version 5.17/02) is planned for August 30. The next production release (will be version 5.18/00) is planned for December 12.

Production Version 5.14/00

15/12/2006

The Production release of ROOT 5.14/00 is now available. The CVS tag for this version is v5-14-00. Tar files for the source, documentation and binaries are available at: Version 5.14/00 Release Notes Full development notes (CVS logs) Download this version A patch release 5.14/00g is available. The AFS versions of 5.14/00g can be found at: /afs/cern.ch/sw/lcg/external/root/5.14.00g/osx104_ppc_gcc401/root for osx 10.4 gcc4.0.1 /afs/cern.ch/sw/lcg/external/root/5.14.00g/slc3_ia32_gcc323/root for slc3 gcc3.2.3 /afs/cern.ch/sw/lcg/external/root/5.14.00g/slc3_ia32_gcc323_dbg/root for slc3 gcc3.2.3/debug /afs/cern.ch/sw/lcg/external/root/5.14.00g/slc4_ia32_gcc34/root for slc4 gcc3.4 /afs/cern.ch/sw/lcg/external/root/5.14.00g/slc4_ia32_gcc34_dbg/root for slc4 gcc3.4/debug /afs/cern.ch/sw/lcg/external/root/5.14.00g/slc4_amd64_gcc34/root for slc4 amd64 gcc3.4 /afs/cern.ch/sw/lcg/external/root/5.14.00g/slc4_amd64_gcc34_dbg/root for slc4 amd64 gcc3.4/debug /afs/cern.ch/sw/lcg/external/root/5.14.00g/win32_vc71_dbg/root for win32 msvc7.1/debug The next development release (will be version 5.15/02) is planned for February 15. see announcement above.

ROOT 2007 Users Workshop at CERN

1/12/2006

We are pleased to announce that the 2007 ROOT Users Workshop will take place on 26, 27 and 28 March, 2007 at CERN. See the web page for the workshop which will allow you to register and has general information on the workshop. We are particularly interested by talks in the following categories: Use of ROOT as a general framework. Data analysis scenarios using ROOT, PROOF and Selectors. Experience with I/O. Use of the GUI and graphics classes. Use in DAQ, real time systems and client/servers. Distributed applications on the GRID. Statistical analysis tools and classes. Usage of the different language bindings. We also invite participants to come with questions, comments, proposals to be discussed in a special Q&A session. The abstracts to the workshop must be submitted before February 25. We are looking forward to seeing many of you at the workshop. The ROOT 2007 organizing committee: Rene Brun (CERN) Philippe Canal (FNAL) Fons Rademakers (CERN) Nathalie Knoors (CERN)

Production Version 5.12/00

11/07/2006

The Production release of ROOT 5.12/00 is now available. The CVS tag for this version is v5-12-00. Tar files for the source, documentation and binaries are available at: Version 5.12/00 Release Notes Full development notes (CVS logs) Download this version A patch release 5.12/00e The AFS versions of 5.12/00e can be found at: /afs/cern.ch/sw/lcg/external/root/5.12.00f/slc3_ia32_gcc323/root for slc3 gcc3.2.3 /afs/cern.ch/sw/lcg/external/root/5.12.00f/slc3_ia32_gcc323_dbg/root for slc3 gcc3.2.3/debug /afs/cern.ch/sw/lcg/external/root/5.12.00f/slc3_ia32_gcc344/root for slc3 gcc3.4.4 /afs/cern.ch/sw/lcg/external/root/5.12.00f/slc3_amd64_gcc344/root for slc3 amd64 gcc3.4.4 /afs/cern.ch/sw/lcg/external/root/5.12.00f/slc4_ia32_gcc345/root for slc4 gcc3.4.5 /afs/cern.ch/sw/lcg/external/root/5.12.00f/slc4_amd64_gcc345/root for slc4 amd64 gcc3.4.5 /afs/cern.ch/sw/lcg/external/root/5.12.00f/win32_vc71_dbg/root for win32 msvc7.1 Note that if you install from source and use the CASTOR option, you must download a version of CASTOR >= 2.1. Highlights of this new version: Performance improvements when reading/writing remote files Generic mechanism for object references New Multi Variate Analysis package TMVA New Fast Fourier Transform package FFTW Many improvements in MathCore, Smatrix and TMatrix Improvements in Random Number Generators Use of precompiled headers in the build system Many developments in PROOF New MonaLisa monitoring interface Improvements in the SQL interfaces. New package ODBC. GL in the pad. Many improvements Grayscale option to print or preview a canvas New option in TGraph to draw an exclusion area GUI Builder; Important developments. Many improvements in the GUI, including new object editors New Geometry Builder and Editor A new lightweight Qt interface from GSI Port of ROOT file serving handler mod_root to Apache 2 An improved version of THtml visible in the Reference manual pages This new version is working with gcc4.1 Last but not least: a new version of the Users Guide The next production release (will be version 5.14) is planned for Christmas. The coming development version will be 5.13/01.

Opening of the RootTalk Forum	07/05/2002
For the full list of previous News, see Old ROOT News.

Production Version 5.10/00

02/03/2006

The production release of ROOT 5.10/00 is now available. This new version was requested by Atlas and LHCb. Tar files for the source, documentation and binaries are available at: Version 5.10/00 Release Notes http://root.cern.ch/root/Version510.html The CVS tag for this version is v5-10-00. The AFS versions of 5.10/00 can be found at: /afs/cern.ch/sw/root/v5.10.00/slc3_gcc3.2.3/root for slc3 gcc3.2.3

Production Version 5.08/00

15/12/2005

The production release of ROOT 5.08/00 is now available. This new version includes several new packages and libraries: minuit2: A new version of the Minuit package in libMinuit2. smatrix: A minimal but fast matrix package in libSmatrix. splot: A new package to help disentangling signal from background in libSPlot. monalisa: A new package for monitoring distributed applications in libMonaLisa. gfal: A new package to access remote files on the GRID in libGFAL. Tar files for the source, documentation and binaries are available at: Version 5.08/00 Release Notes http://root.cern.ch/root/Version508.html The new splot and smatrix packages are installed by default. The other packages are optional. The minuit2 package is included in the binary files. To install gfal and monalisa see the Release Notes. If you install from source, do, eg: ./configure --enable-minuit2 The CVS tag for this version is v5-08-00. The AFS versions of 5.08/00 can be found at: /afs/cern.ch/sw/root/v5.08.00/slc3_gcc3.2.3/root for slc3 gcc3.2.3

Caltech-SLAC-FNAL Team Win Supercomputing 2005 Bandwidth Challenge

24/11/2005

SC2005 has published some results of several challenges including bandwidth utilization. The winner (a Caltech led team of several institutes) was measured at 130 Gbps. On their site you can find some more information on their measurements and the equipment they used. One of the key data mover components was the xrootd deamon developed by Andy Hanushevsky from SLAC. Congratulations to them, and good to know that ROOT remote file access is done by one of the fastest servers out there.

Production Version 4.04/02

04/05/2005

The Production release of ROOT 4.04/02 is now available. See THIS IMPORTANT ANNOUNCEMENT. See also the announcement of the ROOT2005 Workshop. Tar files for the source, documentation and binaries are available at: Version 4.04/02 Release Notes http://root.cern.ch/root/Version404.html The CVS tag for this version is v4-04-02. Since the release of 4.04/02 several patches have been introduced. You can see the status of version 4.04 at: the Download page and the Version 4.04/02 Patch Release Notes page The AFS versions of 4.04/02 can be found at: /afs/cern.ch/sw/root/v4.04.02/slc3_gcc3.2.3/root for slc3 gcc3.2.3 /afs/cern.ch/sw/root/v4.04.02/rh73_gcc32/root for Redhat7.3 gcc3.2 /afs/cern.ch/sw/root/v4.04.02/sun4x_58/root for Solaris5.8 CC5.2

Production Version 4.02/00

17/12/2004

The production release of ROOT 4.02/00 is now available. Tar files for the source, documentation and binaries are available at: Version 4.02/00 Release Notes http://root.cern.ch/root/Version402.html The CVS tag for this version is v4-02-00. The AFS versions of 4.02/00 can be found at: /afs/cern.ch/sw/root/v4.02.00/rh73_slc3/root for Redhat7.3-slc3 gcc3.2.3 /afs/cern.ch/sw/root/v4.02.00/rh73_gcc32/root for Redhat7.3 gcc3.2 /afs/cern.ch/sw/root/v4.02.00/rh73_gcc296/root for Redhat7.3 gcc2.96 /afs/cern.ch/sw/root/v4.02.00/sun4x_58/root for Solaris5.8 CC5.2

Production Version 4.00/08

12/07/2004

The production release of ROOT 4.00/08 is now available. Tar files for the source, documentation and binaries are available at: Version 4.00/08 Release Notes http://root.cern.ch/root/Version400.html The CVS tag for this version is v4-00-08. The AFS versions of 4.00/08 can be found at: /afs/cern.ch/sw/root/v4.00.08/rh73_slc3/root for Redhat7.3-slc3 gcc3.2.3 /afs/cern.ch/sw/root/v4.00.08/rh73_gcc32/root for Redhat7.3 gcc3.2 /afs/cern.ch/sw/root/v4.00.08/rh73_gcc296/root for Redhat7.3 gcc2.96 /afs/cern.ch/sw/root/v4.00.08/sun4x_58/root for Solaris5.8 CC5.2

Development Version 4.00/06a	08/06/2004
We have introduced a bug fix release with the CVS tag v4-00-06a. This fixes a back incompatibility for files written with older versions and containing objects of classes TVector, TVectorF, TVectorD, TMatrixF or TMatrixD. Source and binary tar files corresponding to this tag are available at: http://root.cern.ch/root/Version400.html

Development Version 4.00/06

06/06/2004

The development release of ROOT 4.00/06 is now available. Tar files for the source, documentation and binaries are available at: Version 4.00/06 Development Notes http://root.cern.ch/root/Version400.html The CVS tag for this version is v4-00-06. The AFS versions of 4.00/06 can be found at: /afs/cern.ch/sw/root/v4.00.06/rh73_cel3/root for Redhat7.3-cel3 gcc3.2.3 /afs/cern.ch/sw/root/v4.00.06/rh73_gcc32/root for Redhat7.3 gcc3.2 /afs/cern.ch/sw/root/v4.00.06/rh73_gcc296/root for Redhat7.3 gcc2.96 /afs/cern.ch/sw/root/v4.00.06/sun4x_58/root for Solaris5.8 CC5.2 A quick summary of the new features in version 4.00/06 (w.r.t. 4.00/04). Support for autoloading libraries when an unknown class is being referenced. The autoloading mechanism reads the files $ROOTSYS/etc/system.rootmap, ~/.rootmap and ./.rootmap (via TEnv) to try to map the unknown class to a library. If the library is found it is loaded and CINT will create the class object. The rootmap files are created with the rlibmap tool when executiong "make map". Example: In an interactive session, one can do directly TLorentzVector v; without executing gSystem->Load("libPhysics"); New method TClass::GetSharedLibs() returning the library containing the code of the class and the libraries it depends on. This information is obtained from TCint and cached in TClass. New module xml from Sergey Linev (GSI). It is an optional package that can be used to write file.xml instead of file.root. XML files do not have any advantages compared to the normal ROOT files, except that the information in these files can be edited via a normal editor. The main motivation for this new format is to facilitate the communication with other non ROOT applications. Currently writing and reading XML files is limited to ROOT applications. It is our intention to develop a simple reader independent of the ROOT libraries that could be used as an example for real applications. The XML format should be used only for small data volumes, typically histogram files, pictures, geometries, calibrations. The XML file is built in memory before being dumped to disk. Like for normal ROOT files, XML files use the same I/O mechanism exploiting the ROOT/CINT dictionary. Any class having a dictionary can be saved in XML format. This first implementation does not support subdirectories or Trees. The shared library libRXML.so may be loaded dynamically via gSystem->Load("libRXML"). This library is automatically loaded by the plugin manager as soon as a XML file is created via, eg TFile::Open("file.xml","recreate"); TFile::Open returns a TXMLFile object. When a XML file is open in write mode, one can use the normal TObject::Write to write an object in the file. example of a session saving a histogram to a XML file ===================================================== TFile *f = TFile::Open("Example.xml","recreate"); TH1F *h = new TH1F("h","test",1000,-2,2); h->FillRandom("gaus"); h->Write(); delete f; example of a session reading the histogram from the file ======================================================== TFile *f = TFile::Open("Example.xml"); TH1F *h = (TH1F*)f->Get("h"); h->Draw(); A new option in the canvas "File" menu is available to save a TCanvas as a XML file. One can also do canvas->Print("Example.xml"); New module ruby from Elias Athanasopoulos. In a similar way to PyRoot, it is an interface between ROOT and the Ruby interpreter. For more details see: the HowtoRuby page. See also the Elias web site. New interface in TDirectory/TFile to write objects non-deriving from TObject New module quadp from Eddy Offermann. For Quadratic Linear Programming. The corresponding documentation is expected in a few weeks. Several improvements in the matrix package. possibility to construct random matrices, general symmetric and positive definite Introduction of new matrix class: TMatrixDSparse . It defines a general sparse matrix in Harwell-Boeing format (sparse structure definition optimized for matrix-vector multiplications). Like all the other matrix classes, it derives from TMatrixDBase Introduction of a new decomposition class: TDecompSparse . It allows decomposition (and therefore equation solving) of sparse symmetric matrices New constructor in TGraphAsymmErrors to create a graph from the division of two histograms. The asymmetric errors are computed by the new function BayesDivide. New TGraphErrors constructor reading data from a file (like TGraph) For more details see the development notes.

Development Version 4.00/04

30/04/2004

The development release of ROOT 4.00/04 is now available. Tar files for the source, documentation and binaries are available at: Version 4.00/04 Development Notes http://root.cern.ch/root/Version400.html The CVS tag for this version is v4-00-04. The AFS versions of 4.00/04 can be found at: /afs/cern.ch/sw/root/v4.00.04/rh73_cel3/root for Redhat7.3-cel3 gcc3.2.3 /afs/cern.ch/sw/root/v4.00.04/rh73_gcc32/root for Redhat7.3 gcc3.2 /afs/cern.ch/sw/root/v4.00.04/rh73_gcc296/root for Redhat7.3 gcc2.96 /afs/cern.ch/sw/root/v4.00.04/sun4x_58/root for Solaris5.8 CC5.2 A quick summary of the new features in version 4.00/04 (w.r.t. 4.00/03). Many improvements in most packages, including a few bug fixes. The canvas menus have been restructured to better follow standard conventions. In particular see the new versions of File, Edit and View menus. The new graphics editor is now the default editor. Use the canvas Help button to get more info on the editor. If you want to change the default editor to the old editor, you must edit the file $ROOTSYS/etc/system.rootrc with the two following lines Plugin.TVirtualPadEditor: Ged TPadEditorOld GedOld "TPadEditorOld()" #Plugin.TVirtualPadEditor: Ged TGedEditor Ged "TGedEditor(TCanvas*)" With the new editor, new widgets for editing line, fill, text and marker attributes have been introduced, as well as a new axis attribute editor. The final version of 4.00 in June will contain more interactive widgets and also an Undo/Redo facility using the new classes TQCommand and TUndoManager. A new package PyRoot by Pere Mato & Wim Lawrijsen (LCG project) is introduced. PyRoot is a Python interface to any class having a CINT dictionary. The installation is currently certified only on Linux with gcc3.2, icc and Windows with VC++ (6 and 7). Python/ROOT tutorials are available in $ROOTSYS/tutorials/*.py. For more information on PyRoot see the HOWTO page. Several improvements in the TGeo classes: TGeoXtru navigation now fully implemented Improvements in the ray-tracing algorithm TGeoManager: possibility to clear/delete the list of physical nodes TGeoArb8: Implementation of Safety() (even if shape is twisted) TGeoPhysicalNode: possibility to align a physical node. One can define a physical node according a path, then change its local transformation matrix OR shape - the corresponding branch is decoupled from the logical tree and a new trackable branch is created. A post-alignment check for overlaps can be perfomed for the aligned node. Finally all primitive shapes have full implementation of all navigation methods: Contains(), DistToIn(), DistToOut(), Safety(), ComputeNormal() New tutorial geodemo.C demonstrating all TGeo shapes. Several improvements in the histogram painter: The option TEXT is now also valid for 1D histograms. The TEXT angle can be specified: TEXTnn where n in an angle in degrees. First version of the option E (error bars) for 2D histograms. New class TComplex (F.Carminati) with support for all the arithmetic operators and mathematical functions. See also the new test program ctorture.cxx. New functions in TMath::Binomial, TMath::Permute (F.Carminati). Added corresponding tutorials binomial.C and permute.C. Several functions inlined. Protections added against NaN. New function TSpline::SaveAs to generate C++ code for the spline. This code can be used in a non ROOT application. Improvements in $ROOTSYS/bin/hadd. New option "-T" Many improvements in the authentication system. For more details see the development notes.

Development Version 4.00/03

25/03/2004

The development release of ROOT 4.00/03 is now available. Tar files for the source, documentation and binaries are available at: Version 4.00/03 Development Notes http://root.cern.ch/root/Version400.html The CVS tag for this version is v4-00-03. The AFS versions of 4.00/03 can be found at: /afs/cern.ch/sw/root/v4.00.03/rh73_gcc32/root for Redhat7.3 gcc3.2 /afs/cern.ch/sw/root/v4.00.03/rh73_gcc296/root for Redhat7.3 gcc2.96 /afs/cern.ch/sw/root/v4.00.03/sun4x_58/root for Solaris5.8 CC5.2 A quick summary of the new features in version 4.00/03 (w.r.t. 4.00/02). Many improvements in the Tree query mechanism. Many improvements for STL collections (rootcint and Trees). Many improvements in the Matrix classes. See Matrix Inversion Tutorial New function TGraph::Eval. Many improvements in the authentication classes. PDF files are now compressed by default. Many improvements in the GUI for win32gdk. TTree::BuildIndex may be used with a majorname only. $ROOTSYS/bin/hadd is now able to merge files containing histograms and Trees. For more details see the development notes.

Browsing CVS Using ViewCVS	04/03/2004
On popular demand the ROOT CVS is now browsable using ViewCVS. The ViewCVS link is available via the "CVS" and "Reference Guide" items on the left side of the home page.

Development Version 4.00/02

20/02/2004

The first development release of ROOT 4.00/02 is now available. Tar files for the source, documentation and binaries are available at: Version 4.00/02 Development Notes http://root.cern.ch/root/Version400.html The CVS tag for this version is v4-00-02. The AFS versions of 4.00/02 can be found at: /afs/cern.ch/sw/root/v4.00.02/rh73_gcc32/root for Redhat7.3 gcc3.2 /afs/cern.ch/sw/root/v4.00.02/rh73_gcc296/root for Redhat7.3 gcc2.96 /afs/cern.ch/sw/root/v4.00.02/sun4x_58/root for Solaris5.8 CC5.2 A quick summary of the new features in version 4 (w.r.t. 3.10/02) support for large files above 2 GBytes. automatic schema evolution for foreign classes. Generic support for STL collections in the dictionary. STL vector behaves like a TClonesArray of T, including split mode). New data type Double32_t (double in memory, 32 bits in file). Consolidation of the PROOF classes. More features in the authentication system. New Linear Algebra package. New class TRolke by Jan Conrad. This class computes confidence intervals for the rate of a Poisson in the presence of background and efficiency with a fully frequentist treatment of the uncertainties in the efficiency and background estimate using the profile likelihood method. New Graphical Object Editor (optional). To activate the new editor, uncomment the line defining the TVirtualEditor in system.rootrc and use the definition with the new editor, as shown below: #Plugin.TVirtualPadEditor: Ged TPadEditorOld GedOld "TPadEditorOld()" Plugin.TVirtualPadEditor: Ged TGedEditor Ged "TGedEditor(TCanvas *c)" This new editor will soon become the default. generation of pdf files in addition to ps, eps, gif, etc. New class TGraph2DErrors. More features in TGraph2D. Consolidation of win32gdk. For more details see the development notes.

Release of ROOT Version 3.10/02

17/12/2003

The release of ROOT 3.10/02 is now available. Tar files for the source, documentation and binaries are available at: Version 3.10/02 Release Notes http://root.cern.ch/root/Version310.html A new version of the USERS GUIDE is available at http://root.cern.ch/root/doc/RootDoc.html The CVS tag for this version is v3-10-02. The AFS versions of 3.10/02 can be found at: /afs/cern.ch/sw/root/v3.10.02/rh73_gcc32/root for Redhat7.3 gcc3.2 /afs/cern.ch/sw/root/v3.10.02/rh73_gcc296/root for Redhat7.3 gcc2.96 /afs/cern.ch/sw/root/v3.10.02/rh73_gcc2952/root for Redhat7.3 gcc2.95.2 /afs/cern.ch/sw/root/v3.10.02/sun4x_57/root for Solaris5.7 CC5.2 /afs/cern.ch/sw/root/v3.10.02/sun4x_58/root for Solaris5.8 CC5.2

ROOT 2004 Users Workshop at SLAC

27/10/2003

We are pleased to announce that the 2004 ROOT Users Workshop will take place on 25, 26 and 27 February, 2004 at the Stanford Linear Accelerator Center (SLAC). See the web page for the workshop Information on workshop registration, accomodation and a form for submitting abstracts for presentations at the workshop are all linked from the workshop main page. We are particularly interested by talks in the following categories: Use of Root as a general framework. Experience with I/O, comparing different solutions using Trees or other mechanisms. Use of the Root/CINT dictionary to implement interfaces with foreign systems. Use of the GUI and graphics classes. Use in DAQ, Real time systems and client/servers. Distributed applications on the GRID. Statistical Analysis tools and classes. We also invite participants to come with questions, comments, proposals to be discussed in a special Q&A session. We are looking forward to seeing many of you at the workshop. The ROOT2004 organizing committee: Rene Brun (CERN) Philippe Canal (FNAL) Peter Elmer (Princeton/BaBar) Masaharu Goto Stephen J. Gowdy (SLAC/BaBar) Fons Rademakers (CERN/Alice)

Release of ROOT Version 3.10/01

08/09/2003

The release of ROOT 3.10/01 is now available. Tar files for the source, documentation and binaries are available at: http://root.cern.ch/root/Version310.html The CVS tag for this version is v3-10-01. The AFS versions of 3.10/01 can be found at: /afs/cern.ch/sw/root/v3.10.01/rh73_gcc32/root for Redhat7.3 gcc3.2 /afs/cern.ch/sw/root/v3.10.01/rh73_gcc296/root for Redhat7.3 gcc2.96 /afs/cern.ch/sw/root/v3.10.01/rh73_gcc2952/root for Redhat7.3 gcc2.95.2 /afs/cern.ch/sw/root/v3.10.01/sun4x_57/root for Solaris5.7 CC5.2 /afs/cern.ch/sw/root/v3.10.01/sun4x_58/root for Solaris5.8 CC5.2

Opening of the RootTalk Forum	28/07/2003
The new RootTalk Forum is now open. You can use this forum to discuss ROOT issues in addition to the roottalk mailing list. The forum is directly reachable via the link in the menu on the left side of this page.

Release of ROOT Version 3.05/07

28/07/2003

The release of ROOT 3.05/07 is now available. Tar files for the source, documentation and binaries are available at: http://root.cern.ch/root/Version305.html A new version of the USERS GUIDE is available at http://root.cern.ch/root/doc/RootDoc.html On Windows systems, this version has been compiled with the ANSISTREAM compatibility option. You will have to change your compilation options. The win32 and win32gdk versions have been compiled under VisualC++7.NET. These versions may not run correctly under Windows95 or Windows98 (we do not support these obsolete versions anymore). See remarks at the download page mentioned above concerning the Windows version. The CVS tag for this version is v3-05-07. The AFS versions of 3.05/07 can be found at: /afs/cern.ch/sw/root/v3.05.07/rh73_gcc32/root for Redhat7.3 gcc3.2 /afs/cern.ch/sw/root/v3.05.07/rh73_gcc296/root for Redhat7.3 gcc2.96 /afs/cern.ch/sw/root/v3.05.07/rh73_gcc2952/root for Redhat7.3 gcc2.95.2 /afs/cern.ch/sw/root/v3.05.07/rh61_gcc2952/root for Redhat6.1 gcc2.95.2 /afs/cern.ch/sw/root/v3.05.07/sun4x_57/root for Solaris5.7 CC5.2 /afs/cern.ch/sw/root/v3.05.07/sun4x_58/root for Solaris5.8 CC5.2

Release of ROOT Version 3.04/02

18/12/2002

The release of ROOT 3.04/02 is now available. Find the source and binary tar balls at the download page. This early release has been requested by the CMS collaboration and the POOL project. This version includes several new developments and also a number of bug fixes. For more see: Version 3.04/02 Release Notes Version 3.04/02 Development Notes Tar files for the source, documentation and binaries are available at: http://root.cern.ch/root/Version304.html The AFS versions of 3.04/02 can be found at: /afs/cern.ch/sw/root/v3.04.02/rh73_gcc32/root for Redhat7.3 gcc3.2 /afs/cern.ch/sw/root/v3.04.02/rh72_gcc32/root for Redhat7.2 gcc3.2 /afs/cern.ch/sw/root/v3.04.02/rh72_gcc296/root for Redhat7.2 gcc2.96 /afs/cern.ch/sw/root/v3.04.02/rh72_gcc2953/root for Redhat7.2 gcc2.95.3 /afs/cern.ch/sw/root/v3.04.02/rh61_gcc2952/root for Redhat6.1 gcc2.95.2 /afs/cern.ch/sw/root/v3.04.02/rh61_egcs/root for Redhat6.1 egcs1.1 /afs/cern.ch/sw/root/v3.04.02/hp700_ux102_aCC/root for Hpux10.20 aCC /afs/cern.ch/sw/root/v3.04.02/sun4x_57/root for Solaris5.7 CC5.2 /afs/cern.ch/sw/root/v3.04.02/sun4x_58/root for Solaris5.8 CC5.2 /afs/cern.ch/sw/root/v3.04.02/nt4/root for Windows/NT4/W2K Rene Brun, Philippe Canal, Olivier Couet, Masaharu Goto and Fons Rademakers

Consolidation Release of ROOT Version 3.03/09

19/09/2002

Following the release of ROOT 3.03/08 on August 21, a few bugs have been reported. Meanwhile, a new release of CERNLIB has been produced with a new version of RFIO and the CASTOR system. We have decided to introduce a consolidation release 3.03/09. In addition to the bug fixes, this version includes also several new developments. The description of the bug fixes and new features can be found at: Version 3.03/09 Update Notes see also: Version 3.03/08 Release Notes Tar files for the source, documentation and binaries are available at: http://root.cern.ch/root/Version303.html The AFS versions of 3.03/09 can be found at: /afs/cern.ch/sw/root/v3.03.09/rh72_gcc32/root for Redhat7.2 gcc3.2 /afs/cern.ch/sw/root/v3.03.09/rh72_gcc296/root for Redhat7.2 gcc2.96 /afs/cern.ch/sw/root/v3.03.09/rh72_gcc2953/root for Redhat7.2 gcc2.95.3 /afs/cern.ch/sw/root/v3.03.09/rh61_gcc2952/root for Redhat6.1 gcc2.95.2 /afs/cern.ch/sw/root/v3.03.09/rh61_egcs/root for Redhat6.1 egcs1.1 /afs/cern.ch/sw/root/v3.03.09/hp700_ux102_aCC/root for Hpux10.20 aCC /afs/cern.ch/sw/root/v3.03.09/sun4x_57/root for Solaris5.7 CC5.2 /afs/cern.ch/sw/root/v3.03.09/sun4x_58/root for Solaris5.8 CC5.2 /afs/cern.ch/sw/root/v3.03.09/nt4/root for Windows/NT4/W2K Rene Brun, Philippe Canal, Olivier Couet, Masaharu Goto and Fons Rademakers

Official Release of ROOT Version 3.03

21/08/2002

The ROOT team is happy to announce that version v3.03/08 will be the official version 3.03. See: Version 3.03/08 Release Notes A new geometry package has been introduced (TGeo... classes) with the corresponding shared libraries libGeom.so and libGeomPainter.so. The TGeo classes form the new ROOT Geometry package. It is being developed in collaboration with Andrei & Mihaela Gheata from the ALICE collaboration. This version must be considered as an alpha release. Our goal is to deliver a complete system at the end of this year. More information about this new package can be found at: The TGeoManager class Binaries for the supported platforms are available at: http://root.cern.ch/root/Version303.html Versions for AFS have also been produced. See the list of supported platforms: http://root.cern.ch/root/AFS.html The AFS versions of 3.03/08 can be found at: /afs/cern.ch/sw/root/v3.03.08/rh72_gcc32/root for Redhat7.2 gcc3.2 /afs/cern.ch/sw/root/v3.03.08/rh72_gcc296/root for Redhat7.2 gcc2.96 /afs/cern.ch/sw/root/v3.03.08/rh72_gcc2953/root for Redhat7.2 gcc2.95.3 /afs/cern.ch/sw/root/v3.03.08/rh61_gcc2952/root for Redhat6.1 gcc2.95.2 /afs/cern.ch/sw/root/v3.03.08/i386_redhat60/root for Redhat6.1 egcs1.1 /afs/cern.ch/sw/root/v3.03.08/hp700_ux102_aCC/root for Hpux10.20 aCC /afs/cern.ch/sw/root/v3.03.08/sun4x_57/root for Solaris5.7 CC5.2 /afs/cern.ch/sw/root/v3.03.08/sun4x_58/root for Solaris5.8 CC5.2 /afs/cern.ch/sw/root/v3.03.08/nt4/root for Windows/NT4/W2K A file containing the Classes Reference Manual for this version can also be downloaded from: ROOT Version 3.03/08 Classes Reference Manual Rene Brun, Philippe Canal, Olivier Couet, Masaharu Goto and Fons Rademakers

Announcement: Fourth ROOT Users Workshop	07/05/02
After the very successful Third ROOT Users Workshop in June 2001 at Fermilab we are happy to annouce the Fourth ROOT Users Workshop, to be held at CERN the 14th, 15th and 16th of October 2002.

Consolidation Release of ROOT Version 3.02/07

11/01/2002

Following the release of ROOT 3.02/06 on December 12, a few bugs have been reported. We have decided to introduce a consolidation release 3.02/07. In addition to the bug fixes, this version includes also several new developments. The description of the bug fixes and new features can be found at: Version 3.02 Update Notes see also: Version 3.02 Release Notes Tar files for the source, documentation and binaries are available at: http://root.cern.ch/root/Version302.html The AFS files will be updated Monday morning 14 January. Rene Brun, Philippe Canal, Masaharu Goto and Fons Rademakers

RootAux - A new website to help you find ROOT related projects	13/12/2001
See Tim Smith announcement of his Web site designed to help you find out what other root users have developed. The site is called "Root Auxiliary" and is located at: http://rootAux.lns.mit.edu/

Official Release of ROOT Version 3.02

13/12/2001

The ROOT Team is pleased to announce the release of ROOT version 3.02. This version is source code compatible with the previous production release (v3.01/06) and has major enhancements described at: Version 3.02 Release Notes Binaries for all supported platforms are available at: http://root.cern.ch/root/Version302.html Versions for AFS have also been updated. See the list of supported platforms: http://root.cern.ch/root/AFS.html Both links are reachable via the download page. A file containing the Classes Reference Manual for this version can also be downloaded from: ROOT Version 3.02 Classes Reference Manual Rene Brun, Philippe Canal, Masaharu Goto and Fons Rademakers

Development version v3.02/05 available	03/12/2001
This is the 6th pre-release of the development version 3.02. For detailed information see the release notes. Binaries can be downloaded from the standard location.

First Development version v3.02/00 available

29/08/2001

This is the first pre-release of the development version 3.02. For detailed information see the release notes. Binaries can be downloaded from the standard location. This version has a few bug fixes in the I/O package. When a base class has pointers to collections. In case of branch buffers nearly empty and when one switches between read & write mode. This version also fixes a problem with branches of basic types at the top level. The branch buffers were OK, but contained unnecessary additional data making the buffer bigger than it should be.

Consolidation Release of ROOT Version 3.01/06

11/7/2001

We are introducing today a consolidation release ROOT 3.01/06. This version is backward compatible with 3.01/05 and fixes a few problems reported in the past few weeks, in particular in the TTree classes. This version can also be compiled with gcc version 3 and the latest IBM xlC compilers. Please read carefully the release notes at: Version 3.01/06 Release Notes Binaries for all supported platforms are available at: http://root.cern.ch/root/Version301.html Versions for AFS will be updated tomorrow morning. See the list of supported platforms: http://root.cern.ch/root/AFS.html Rene Brun and Fons Rademakers

Official Release of ROOT Version 3.01

08/6/2001

The ROOT Team is pleased to announce the release of ROOT version 3.01. Compared to the previous production release (v3.00/06) this new version has major enhancements in the following areas: Automatic schema evolution Tree branches and Query mechanisms An important new feature; Tree friendship A long list of fixes and enhancements This new version is fully backward compatible with the previous production version. Binaries for all supported platforms are available at: http://root.cern.ch/root/Version301.html Versions for AFS have also been updated. See the list of supported platforms: http://root.cern.ch/root/AFS.html Both links are reachable via the download page. A new version of the UsersGuide in pdf and doc formats is available at: http://root.cern.ch/root/RootDoc.html Rene Brun and Fons Rademakers

New ROOT Apache Module	24/05/2001
It is with great pleasure that Valeriy Onuchin announces the birth of his new baby: the new ROOT Apache Module. Using this powerful new module one can directly use C/C++ as web programming language and the full power of the ROOT class libraries are available to build dynamic web pages.

New Development version v3.01/03 available	21/05/2001
Release of development version 3.01/03 is available in binary form for most platforms. The CVS tag is v3-01-03.

ROOT Ported to Compaq's iPAQ Pocket PC

06/04/2001

ROOT's portability and modularity were confirmed by its port to the Compaq iPAQ Pocket PC. The iPAQ, which has an Intel StrongARM 206MHz CPU, 32MB of flash ROM and 32MB of RAM, runs a StrongARM Linux distribution available from www.handhelds.org. Due to its modular architecture, ROOT can run all its graphical test programs in about 10MB of RAM (the rest of the 32MB of RAM was used by the linux kernel, the X server, the window manager, a shell, some utility daemons and a 5MB ram disk. There is no swap space). See here some screenshots: image 1, image 2, image 3, image 4 and image 5.

Announcement: 3rd ROOT Users Workshop	28/03/2001
After the very successful Second ROOT Users Workshop in February 2000 at CERN we are happy to annouce the Third ROOT Users Workshop, ROOT 2001, to be held at Fermilab the 13th, 14th and 15th of June 2001.

Official Release of ROOT Version 3.00

13/3/2001

The ROOT Team is pleased to announce the release of ROOT version 3.00. After a long period of beta testing with 5 intermediate releases we feel confident to offer version 3.00/06 as the new stable production release of ROOT. We would like to thank our world-wide community of beta testers who helped in making this a solid new release. However, all remaining bugs are the sole responsibility of the ROOT Team. Compared to the previous production release (v2.25/03) this new version has major enhancements in the following areas: Self describing I/O Automatic schema evolution TObject interface cleanup Signal/slots component programming mechanism Grid features like parallel sockets and parallel ftp A long list of fixes and enhancements Except for the changes in the TObject API this new version is fully backward compatible with the previous production version. Binaries for all supported platforms are available at: http://root.cern.ch/root/Version300.html Versions for AFS have also been updated. See the list of supported platforms: http://root.cern.ch/root/AFS.html Both links are reachable via the download page. This is the last release where we will support the following compilers: HP-UX/CC (only aCC will be supported) AIX/xlC 3.2 (we may support a newer compiler if ANSI C++ compliant) Solaris CC 4.2 (only version 5 or higher will be supported) We would like to ask you to very attentively read the full list of new features and enhancements. This will help you in making a smooth transition to ROOT v3.00. Rene Brun and Fons Rademakers

First Development version v3.00/01 available

22/12/2000

This is the first pre-release of the development version 3.00. For detailed information see the release notes. Binaries can be downloaded from the standard location. Note that this version has some backward incompatibilities due to the introduction of constness in the member functions signatures. This new version features several new I/O capabilities. The final release of 3.00 will include additional support for STL and a symmetric behaviour for the Trees split/non-split modes.

Extensions to the ROOT I/O system

28/11/2000

The version 3.0 of ROOT currently under development includes several enhancements in the I/O sub system, such as: A new Automatic Class Schema Evolution system. The StreamerInfo saved to Root files. A self-describing object format. Full support for STL. An automatic code generator from the class StreamerInfo. The document The ROOT I/O system describes the new system including the new features. We invite you to read this document carefully. We strongly encourage as many users as possible to test this development version available only from our main CVS repository and give us feedback. If everything goes well, we are planning to release this new version around Christmas. In the next phase of developments, we are planning to extend the TTree split mode to take advantage of the new system and remove all limitations specific to this mode.

Draft of the ROOT User's Guide Available	31/10/2000
A preliminary version of the ROOT User's Guide is now available. It contains about 20 chapters and 320 pages. Before printing the first edition we appreciate any comments on the current version. Note that we cannot accept requests to ship printed copies at this time.

ROOT Ported to Red Hat 7.0 (glibc 2.2)	02/10/2000
ROOT has been ported to Red Hat 7.0 which uses the new glibc 2.2. The compiler coming with RH 7.0 is fairly buggy. Don't compile code with -O2, use not more than -O. Code is available from CVS. Configure with: ./configure linuxegcs.

Final Version v2.25 Released (v2.25/03)

15/09/2000

We are pleased to announce the final 2.25 release of ROOT. This version contains a number of important new features. Like: The TFolder class. A TFolder hierarchy provides a named, in memory, object store (whiteboard) where objects can be posted. Other classes can access the objects in the folders by name (using a "Unix-like" naming scheme). This whiteboard facility can greatly improve the modularity of an application by minimizing class relationships. Improvements in the TBrowser. The width of the two main panes can be dynamically changed by dragging the bar separating the two panes. This new feature is made possible by the new TGSplitter widget. Explicit collection ownership. By calling the new method TCollection::SetOwner() you can tell a collection it owns the objects stored in it. When an owning collection is cleared or deleted it will delete all the objects it contains. New shape TXTRU by R. Hatcher. New class TGenPhaseSpace by V. Filippini. Latest CINT 5.14.50. Several cleanups in the TObject base class. Many smaller enhancements and bug fixes. See the release notes. Note: due to changes in the base classes and a slight change in the dictionary format all dictionaries need to be regenerated and all sources need to be recompiled to work with this new version. On AFS this version will be available under pro and the CVS tag is v2-25-final. Before starting version 2.26 the ROOT team will spend the next two weeks at the CERN School of Computing in Greece. Depending on the local connectivity our response time may be severly delayed.

New Version v2.25/02 Released

22/08/2000

Consolidation release with several interesting new features. For example: The Principal Components Analysis class TPrincipal and its TTree interface Much improved contour drawing (option CONT) for 2D histograms Latest CINT 5.14.47 Many smaller enhancements, see the release notes Binaries can be downloaded from the standard location. The coming ten days the ROOT team will be very busy preparing its CERN School of Computing lectures so feedback might be reduced during this time. Bear with us.

New Version v2.25/01 Released	08/08/2000
This is a bug-fix release. The only major new class is a text edit GUI widget, TGTextEdit. For detailed information see the release notes. Binaries can be downloaded from the standard location.

New Version v2.25/00 Released

22/06/2000

We are happy to announce the release of version 2.25 of ROOT. Since this new version contains many new features we've bumped the version number from 2.24 to 2.25. We believe that most changes are backward compatible, except in a few well documented cases. The main changes are: change from single to double precision in many classes better handling of arrays in TTree::Draw() source now maintained and available in CVS and new makefiles full cross-reference of the latest sources available on the web ported to even more hardware (including Intel's new Itanium) rootd and proofd now use official IANA assigned port numbers See the release notes for detailed information and download it.

New Version v2.24/04 Released	05/05/2000
See the release notes for detailed information and download it.

New Version v2.24/02 Released	13/04/2000
See the release notes for detailed information and download it. This new version includes some minor fixes and some new developments. Note that new files containing TH2 or TH3 objects cannot be read by a previous version due to a restructuring of the THx inheritance tree. Of course, this new version can read histograms produced by any previous version.

Slides of ROOT 2000 Workshop Talks Available	22/2/2000
The slides of the ROOT 2000 Workshop are now available in native (Powerpoint, StarOffice, KPresenter) and HTML format. Thanks again to all participants who made the workshop such a success.

Version v2.23/10: the Holiday Release	17/12/99
A christmas and new year release for those who want to use the latest, greatest during the holidays. See the release notes for detailed information and download it. The ROOT team would like to wish you all a Merry Christmas and a happy 2000.

New Version v2.23/09 Released	26/11/99
Barring major problems this will be the final 2.23 version. This new version fixes quite a number of small problems and introduces two major new features: SQL (MySQL) access and Feynman diagram drawing classes. See the release notes for detailed information. This version can be downloaded from the usual place.

Announcement: 2nd ROOT Users Workshop	23/11/99
After the very successful First ROOT Users Workshop in March 1999 at Fermilab we are happy to annouce the Second ROOT Users Workshop, ROOT 2000, to be held at CERN the 3rd, 4th and 5th of February 2000 (just a few days before CHEP 2000).

Trigger Control Software for CERES/NA45	18/11/99
Dariusz Miskowiec has written some very nice classes for controlling VME modules. His use of the ROOT GUI classes can be an inspiration for others.

CHEP2000 and Commercial use of ROOT	18/11/99
The organizers of the CHEP 2000 conference are organizing a track on technology transfer. For this they would like to receive papers/talks from people who use ROOT in a commercial or non-High Energy Physics/Nuclear Physics environment. Anybody interested should contact as soon as possible Fabrizio Gagliardi for more information. Padova and Venice are beautiful places in winter.

New Version v2.23/08 Released	2/11/99
We are zooming in on the final 2.23. This new version fixes a number of loose ends. See the release notes for detailed information and rush over to the download area.

New Version v2.23/07 Released	29/10/99
The new version is ready for download. This new version contains some important TTree performance enhancements. See the release notes for detailed information.

New ROOT Home Page

28/10/99

Welcome to the new ROOT home page. Besides an updated look including the new ROOT logo by Giuliana Carminati we try to provide the available information in a more clear and concise way. Also, we would like the home page to be a "portal" to anything happening in the ROOT world, i.e., announcements, example applications, tips & tricks, etc. will be put directly on the home page. Once the list gets too long the older items will overflow to the "Recent News" page.

October 21, 1999:

New Pre-release of ROOT version 2.23/06.

See the release notes for a detailed description of the changes.

October 13, 1999:

First Pre-release of ROOT version 2.23/04.

See the release notes for a detailed description of the changes.

the first stable development version of Root 2.23/04 is now available. Please read very carefully the following points. This new version has an important internal restructuring of the Root libraries. There are also many new features introduced with this version. We are asking your contribution to test this new version and give us feedback.

Binaries are available under AFS. New platforms are supported. See the list at http://root.cern.ch/root/Availability.html

Rene & Fons

NEW LIBRARY STRUCTURE

• moving classes to other categories (i.e. shared libraries)
• introducing new abstract interfaces
• removing unnecessary includes in the implementation files
• calling classes via the interpreter when performance is not an issue
• some minimal changes in several classes

• a program referencing only TObject will need to link the following libraries only (the Root kernel): libCore and libCint. This "kernel" includes the Root I/O. There are no references to graphics, GUI, etc.
• a batch program creating/filling/saving histograms and a Tree will only need the kernel above (libCore, libCint) + the libHist and libTree libraries.

Some new abstract interfaces have been introduced and some changes(renaming) have been made in the existing abstract interfaces. http://root.cern.ch/root/html/gif/Root_Virtual.gif

• TVirtualPad: abstract interface to graphics in a pad, real implementation is TPad. The new TVirtualPad does not derive anymore from TWbox but directly from TObject.
• TVirtualX: abstract interface to the basic windowing system (was TGXW) real implementations are TGX11 (Unix) or TGWin32(Windows/NT)
• TVirtualPS: abstract interface to Postscript, real implementation is TPostScript.
• TVirtualGL: abstract interface to Open GL, real implementation is TGLKernel.
• TVirtualFitter: abstract interface to a minimisation package, real implementation is TFitter calling TMinuit.
• TVirtualHistPainter: abstract interface to histogram graphics, real implementation is THistPainter.
• TVirtualTreePlayer: abstract interface to the TTree analyzer, real implementation is TTreePlayer.
• TInterpreter: abstract interface to a C++ interpreter, real implementation is TCint.
• TSystem: abstract interface to the operating system, real implementations are TUnixSystem, TWinNTSystem,TVMSSystem.

The abstract classes are in the Core library.

These new abstract interfaces increase dramatically the overall modularity of the Root system. For example:

• One can now easily implement an alternative to the standard Root classes, by deriving from one of the abstract interfaces.
-
• The linker knows only about the abstract base classes. For example, TObject::Draw references only the TVirtualPad. There is no need to link with the graphics libraries if graphics is not used.

IMPORTANT NEW FEATURES

• New version of CINT with new features.
• Important changes in class TClassTree.
See TClassTree header for a complete documentation. The new version of this class is more poweful and simple to use. All kinds of class dependencies can be drawn.
• Integrate changes in the THREAD package by Joern Adamczewski, Hans Essel, Marc Hemberger. See their report in the notes.
• Important improvements in the TLatex class.
• Classes TPaveLabel and TPaveText use TLatex instead of TText.
• The graphics editor option Text uses TLatex instead of TText.
• Histogram titles and axis titles accept a TLatex expression.
• InitGui() graphics initialization function not needed anymore.
• CVS repository created. The latest sources can now be retrieved from our anonymous CVS repository. However, it is still needed that you start with a valid binary distribution, to where $ROOTSYS must point (the binary version only has to be installed once).

BACKWARD INCOMPATIBILITIES

• Users having classes referencing the old TGXW class must replace TGXW by TVirtualX and the corresponding global pointer gGXW by gVirtualX.
• The global pointer gCurrentPS has been renamed gVirtualPS.
• The global pointer gGLKernel has been renamed gVirtualGL.
• The methods TObject::Is3D and TObject::Sizeof3D have been removed.
• New class TAtt3D: use this class via multiple inheritance to get 3D capability (like the other TAttxxx classes and like Java's interface mechanism). The virtual function, Sizeof3D(), provided by this class should be overridden. See release notes for more info about TAtt3D.
• The libraries libBase, libCont, libMeta, libClib, libUnix/libWinNT and libZip are merged into one single library libCore.
• To be insulated in the future against any library changes try to use as much as possible the provided script $ROOTSYS/bin/root-config. For its use see $ROOTSYS/test/Makefile.

LINKING parameters

• To be insulated against any library changes and to get the proper list of Root libraries to link with use the provided script $ROOTSYS/bin/root-config. For its use see $ROOTSYS/test/Makefile.
• X11 dependence is now completely contained in libGX11. No need to link anymore an application explicitely with -lXpm and -lX11. Dynamically loading of libGX11 will also force the loading of libXpm and libX11.

IBM AIX

A complete list of all changes and improvements, bug fixes, etc. can be found in the release notes for version 2.23/04.

July 29, 1999:

Fermilab ROOT Educational Material Released.

The Fermilab ROOT support team has prepared a "ROOT Getting Started" guide and an "Introduction to ROOT" course. You can find this material at the Fermilab ROOT support web site.

July 28, 1999:

Release of ROOT version 2.22/10.

See the release notes for a detailed description of the changes.

June 9, 1999:

Now HowTo on using the GUI Classes.

This new HowTo summarizes most known sources of information and example code on how to use the ROOT GUI classes. Note the especially nice, and very well documented, example code by Dmitri Vassili from HADES.

June 4, 1999:

First Pre-release of ROOT version 2.22/04.

See the release notes for a detailed description of the changes.

A short summary of the most important changes is given below:

• New CINT 5.14.4.
• IMPORTANT NEW FEATURE IN THE I/O SUBSYSTEM
  TBuffer: WriteObject() now inserts a byte count in front of the buffer and ReadObject() checks at the end of reading this byte count. If the byte count is not correct the buffer is positioned at the location specified by the byte count so that a next object in the same buffer can still be read correctly. This new feature is very useful to detect if a Streamer() is out of sync compared to the data in the file. Also it will allow the system to skip data of an unkown class (class info has been lost or shared lib is not loaded), and still correctly read the other data.
  THESE CHANGES ARE FULLY BACKWARD COMPATIBLE. HOWEVER, VERSIONS <2.22 CANNOT READ THE FILES PRODUCED BY THE >=2.22 VERSIONS. PLEASE UPGRADE.
• Rootcint: generate Streamer code for STL containers vector, list, deque, map, set, multimap and multiset. It is now possible to do automatic I/O for classes containing these containers.
• Several changes in class TH1:
  • New member functions to return a random number distributed according the contents of a histogram.

         Axis_t   GetRandom();  // for 1-d
         void     GetRandom2(Axis_t &x, Axis_t &y); //for 2-d
         void     GetRandom3(Axis_t &x, Axis_t &y, Axis_t &z); //for 3-d
    

    For the 3 cases GetRandom computes the integral of the bins if not yet done). This integral (fIntegral) is normalized to 1 and a random number returned following this integral.
  • Existing functions TH1::FillRandom(TF1*) and TH1::FillRandom(TH1*) have been modified. TH1::FillRandom(TH1*) has been rewritten to use the new TH1::GetRandom() functions. The new function does not require that the source and destination histogram have the same number of bins or bin limits. Statistics are also correctly filled.
  • Changes in prototype for TH1::DrawCopy from

         old: void    DrawCopy(Option_t *option="");
         new: TH1    *DrawCopy(Option_t *option="");
    

• Changes in TTree::MakeClass. The new version generates a skeleton analysis function allowing a better performance when reading the tree. In addition, to the list of leaf (variable) names, the new version also generates for each branch a member like:

      TBranch *b_branchname;
  

  In the analysis loop, one can call

        b_branchname->GetEntry(entry) to read only the variables belonging
  

  to this branch. The branch pointers are initialized in the Init function. Note that if b_branchname->GetEntry(entry) is invoked more than once for the same entry, the subsequent calls return immediatly from GetEntry.
• WARNING Terminology change in TTree
  We now call "entry" what was called "event" We have added the following functions

       TTree::GetEntry
       TChain::GetEntry
       TBranch::GetEntry
  

  These new functions behave like the old GetEvent functions. We have left the old GetEvent functions for backward compatibility. However, note that these old functions call the new functions GetEntry. We strongly encourage you to make the corresponding changes in your code.
• New class in patch EG: TParticle. This new class replaces the old class TPrimary (left for compatibility). The classes TGenerator, TVenus, TPythia changed to use the new class. TGenerator::GetPrimaries has been renamed TGenerator::ImportParticles.
• New class TTabCom: very useful new class made by Christian Lacunza <lacunza@cdfsg5.lbl.gov>. This class performs basic tab completion. You should be able to hit [TAB] to complete a partially typed:

       username
       environment variable
       preprocessor directive
       pragma
       filename (with a context-sensitive path)
       public member function or data member
       global variable, function, or class name
  

• IMPORTANT CHANGE for EGCS users
  In $kumacs/globals and all makefiles the options -fno-rtti -fno-exceptions have been removed. When we moved from gcc to egcs1.0 about 1 year ago, we found out that using the default compiler options was generating a huge overhead in space in the object files. In particular the exceptions could generate a few tens of kilobytes of additional code compared to no-exceptions. We saw many cases of small and medium size classes (in fact the majority) for which the object file was more than double. Because support for rtti and exceptions was supported by only a few compilers at the time, we set by default the options above. Egcs1.1 is now generating a more compact code than its predecessor and is quickly becoming the standard compiler on Linux. We have compared a few weeks ago the overhead induced by each option above and found the following result on the ROOT classes

     -rtti overhead = 1.2 per cent (totally negligible)
     -exceptions    = 20 per cent
  

  The overhead generated by the exceptions option is still not negligible. However, we have decided to compile ROOT with the default egcs options.

May 10, 1999:

First ALICE Mock Data Challenge Produces 7 TB ROOT DB in 7 days.

April 7, 1999:

Talks given at the First US HENP ROOT Users Workshop available.

March 19, 1999:

Introduction of development version 2.21/08.

As soon as we are back from the ROOT workshop at FNAL next week, we will start a new development cycle with 2.22.

Since the full development team will attend this workshop, you may experience a slow response time in the following days.

February 18, 1999:

Introduction of development version 2.21/06.

This version now also supports TrueType fonts on AIX and has an interface to CERN's RFIO system (in binary versions currently only for Linux and HP versions).

December 18, 1998:

New ROOT version 2.20/06.

This new version has also been stored in the AFS area under pro. The previous AFS version (2.00/13) is still available under old. See Status and Availability for more details on the AFS pathnames for the various machines. Version 2.00/13 will be kept until the next release of ROOT.

This new release includes a long list of tiny improvements and a few bug fixes. See the release notes for more details. The following is a summary of the main features of this new version.

• TrueType Fonts package introduced on Unix (except AIX). The TTF package provides better quality scalable fonts. For the definitive guide on how to use the TT fonts with ROOT see this page.
• New class TClassTree. Draw inheritance tree for a list of classes The following options are supported
  • Direct inheritance (default)
  • Multiple inheritance
  • Composition
  • References
• New class TTreeViewer A graphical front-end to TTree::Draw and Scan. See extensive documentation in the class.
• Additional functionality in class TTimer. - Possibility to notify any TObject without deriving from TTimer. - Possibility to execute an interpreted command/macro at time-out.
• Several new functions in class TRandom (see class for more details and also some benchmarks).
• New functions for random number generation in TF1, TF2 and TF3.
• Several new functions in TMath.
• Zoom with the mouse on axis.
• New functionality in TDirectory (see ReadKeys and SaveSelf).
• Add a new test program called "stress" in test directory. This program can be compiled with the native compiler or interpreted. The program stress is a collection of test programs executed sequentially and testing most of the facets of the Root system. The execution of stress ranges from a few tens of seconds on fast systems to a few minutes. The execution time is used as a benchmark. We expect to add more test programs to the stress test suite.
• Add functionality to save GIF files from displays with more than 8 color planes.
• Added transparent pads.
• New makefiles.

December 9, 1998:

Introduction of new bug tracking system.

To be able to better handle the numerous problem reports and enhancement requests we've introduced a bug tracking system based on JitterBug. JitterBug is a web based bug tracking system. It was originally developed by the Samba Team to handle bug tracking, problem reports and queries from Samba users.

The bug tracking system allows you to follow your bug report as it is being processed by the ROOT team. Also you can check if a certain bug has already been reported and what its processing status is.

November 27, 1998:

Introduction of the development version.

We have slightly reorganized the Status and Availability pages.
We are introducing the development version 2.20.

During the development phase, we will introduce every few days new versions of the source tar file Each new development version will be stamped (eg, 2.20/01, 2.20/02, etc). This version will become the production version in one/two weeks. Once this version will be released, we will start the same process with a new development version labelled 2.21/00.

With the source, we also provide tar files for some systems. Please check the version numbers of tar files before downloading.

October 30, 1998:

New ROOT version 2.00/13.

This new version has also been stored in the AFS area under pro. The previous AFS version (2.00/11) is still available under old. See Status and Availability for more details on the AFS pathnames for the various machines. Version 2.00/11 will be kept until the next release of ROOT.

October 12, 1998:

New ROOT version 2.00/12.

This new version includes a long list of minor changes and bug fixes. In addition, it contains:

• A new version of CINT 5.13.75 from Masa Goto.
• New makefiles for most Unix systems.
• New functions TH1::FitSlicesY and TH1::FitSlicesZ.
• New function TH1::Rebin.
• Clipping improvements for TPolyLines and TGraphs.
• Support for the KAI KCC compiler under IRIX and Linux.
• Support for CXX version 6 under Alpha/Unix.
• New tutorial macros (including a fully functional version of the Tetris game). See items flagged with .

This new version has also been stored in the AFS area under pro. The previous AFS version (2.00/11) is still available under old. See Status and Availability for more details on the AFS pathnames for the various machines. Version 2.00/11 will be kept until the next release of ROOT.

August 28, 1998:

New rebuild of ROOT version 2.00/11.

We have rebuilt the tar files for all systems this morning. Apologies if you had already transferred the new version.

When you run the new Root executable, you should see the date of 28 August not 27 August.

Thanks to Stephen Bailey who discovered the problem and reported it immediatly.

August 27, 1998:

New ROOT version 2.00/11.

This version comes with several small changes and improvements:

• Several problems in TTree::Draw have been fixed.
• Support for schema evolution in Tree split mode.
• New class TLatex (Latex-style formula) on screen and Postscript.

We have modified several functions (see list in the release notes) where arguments of type char* are now const char*. The Root type Option_t (was a char) is now defined as const char. Please check your calling sequences. See also the remarks about the definition of the macro EXTERN and the new macro R__EXTERN.

This new version has also been stored in the AFS area under pro. The previous AFS version (2.00/09) is still available under old. See Status and Availability for more details on the AFS pathnames for the various machines. Version 2.00/09 will be kept until the next release of Root.

July 31, 1998:

New Beta of ROOT version 2.00.

June 29, 1998:

New Beta of ROOT version 2.00.

Important note for AFS users. With this version 2.09, we are introducing a new directory tree under AFS, see the Availability page. The previous version 2.08 is kept under the old directories. The version 2.08 will still be kept for one week. Please move to this new version, which is fully backwards compatible. AFS users should define $ROOTSYS to point to:

/afs/cern.ch/na49/library.4/ROOT/v2.09/i386_linux2/root     for Redhat 4.2 gcc2.7
/afs/cern.ch/na49/library.4/ROOT/v2.09/i386_redhat50/root   for Redhat5.0 egcs
/afs/cern.ch/na49/library.4/ROOT/v2.09/hp700_ux90/root      for Hpux9.05 CC
/afs/cern.ch/na49/library.4/ROOT/v2.09/hp700_ux102/root     for Hpux10.20 CC
/afs/cern.ch/na49/library.4/ROOT/v2.09/hp700_ux102_aCC      for Hpux10.20 aCC
/afs/cern.ch/na49/library.4/ROOT/v2.09/rs_aix41/root        for Aix4 xlC
/afs/cern.ch/na49/library.4/ROOT/v2.09/sun4m_53/root        for Solaris5.6 CC

With this new version, the RootHtmlDoc file has also been updated.

June 5, 1998:

New Beta of ROOT version 2.00.

The version 2.00/08 has also been introduced under AFS for HP-UX 9/10, AIX, Linux and Solaris, see the Availability page.

May 19, 1998:

New Beta of ROOT version 2.00.

We had to introduce this new version shortly after 2.00/06 to cure a few unexpected problems. Apologies if you imported 2.00/06.

Solaris users: Note that we are now compiling ROOT under Solaris 5.6. We tested that this version also works on Solaris 5.4 systems.

The version 2.00/07 has also been introduced under AFS for HP-UX 9/10, AIX, Linux and Solaris, see the Availability page.

With this new version, the RootHtmlDoc file has also been updated.

May 15, 1998:

New Beta of ROOT version 2.00.

April 25, 1998:

ROOT has been ported to the KAI KCC compiler.

April 22, 1998:

New Beta of ROOT version 2.00.

The version 2.00/05 has also been introduced under AFS for HP-UX 9/10, AIX, Linux and Solaris, see the Availability page.

April 17, 1998:

The ROOT Cheat Sheet

April 9, 1998:

New Beta of ROOT version 2.00.

The version 2.00/04 has also been introduced under AFS for HP-UX 9/10, AIX, Linux and Solaris, see the Availability page.

A new binary distribution has been introduced for Linux under Redhat 5.0

March 28, 1998:

New Beta of ROOT version 2.00.

The version 2.00/03 has been introduced under AFS for HPUX9,10,aCC AIX, Linux and Solaris.

March 17, 1998:

Second Beta of ROOT version 2.00.

March 10, 1998:

First Beta of ROOT version 2.00.

• A completely new set of GUI classes.

These new GUI classes provide a full OO GUI framework as opposed to a simple wrapper around Motif. All GUI elements do their drawing via the TGXW abstract base class. Depending on the platfrom where you run ROOT the concrete graphics class (inheriting from TGXW) is either TGX11 or TGWin32. All GUI widgets are created from "first principles", i.e. they only use routines like DrawLine, FillRectangle, CopyPixmap, etc. and therefore the TGX11 implementation only requires X11 (no more need for Motif, Xt, Xaw, etc.) and the Xpm library (for color icons). [The libXpm.so library is distributed with the ROOT libraries in the $ROOTSYS/lib directory.] Another advantage of this approach is that porting to a new, non X11/Win32, platform requires only the implementation of an appropriate version of TGXW (and TSystem for the OS interface).

All GUI classes are now fully scriptable and accessable via the interpreter. This allows for fast prototyping of widget layouts.

The GUI classes are based on the XClass'95 library written by Hector Peraza. The widgets have the well known Win95 look and feel.

All components previously using Motif widgets, like, the Canvas, Browser, Controlbar, ContextMenu, Method Argument Dialogs, etc., have been rewritten using the new widgets.

Except for the automatically generated reference manual, the documentation of the new GUI is still very sparse. However, to see how to implement fairly complex GUI's have a look directly at the source of classes like TRootBrowser, TRootCanvas, TRootDialog, etc. Also try the test program $ROOTSYS/test/guitest.cxx (make guitest). This program excercises most of the widgets.

[For the time being, under Windows, the old user interface classes are still being used.]

The DrawPanel and FitPanel widgets are not yet using the new GUI. Work is in progress to replace these widgets and to add new ones exploiting the power of the new classes.

More details about the new GUI classes can be found here.
 

• New front-end program that starts the actual interactive program.

The actual interactive program, executable "root" in version 1.xx, is now called "root.exe". This program is started via a little front-end program now called "root". From the user's point of view nothing has changed in this respect. You still start ROOT by typing "root". The advantage of this little front-end program however is that it allows the setting of the appropriate LD_LIBRARY_PATH, SHLIB_PATH or LIB_PATH variables (depending on the platform). That means that the user only has to define a single shell variable, ROOTSYS, before using ROOT. Further, since the front-end is very small it will start quickly and, in case of an error (in the command line arguments or in opening an X server connection), it will give feedback immediately, without having to wait for the loading of the ROOT shared libraries, which could take some time especially if they have to be loaded over the network (AFS/NFS). Finally, it is this front-end that displays the "splashscreen" while waiting for "root.exe" to start. The source for the front-end can be found in ROOTX_rootx.cxx and ROOTX_rootxx.cxx (in the source distribution). Change the graphics and the module to be executed when you want to use this front-end to start your own ROOT based standalone application.
 

• Enhancement of the TTree/TBranch classes.

On popular demand (especially by people from FermiLab) branches of TTree objects can now be stored in separate files. This powerful feature allows for very large TTree's and also for the possibility of less used branches to be migrated to mass storage (tape, etc.), while at the same time keeping the rest of the TTree on disk.
 

• New classes THelix and TMarker3DBox.

These classes are interesting in the context of event displays.
 

• Support for more style parameters.

More style options can now be managed via the TStyle class.
 

• New tool GH2ROOT to automatically generate C++ classes to read and convert Geant3 hits.

For more information of this powerful migration tool see: gh2root
 

• Long list of bug fixes, enhancements and new features.

 

Enjoy! And don't forget to give feedback.

January 26, 1998:

Announcing GH2ROOT

It is our intention to extend this code generator in such a way that a Geant3 based application could be completly controlled from a C++/ROOT based interface.

Note that if some member functions of the class XRun are Geant3 specific, all the other functions can also be used in a non-Geant3 based Monte-Carlo.

December 19, 1997:

ATLFast++, the ATLAS fast MonteCarlo program based on ROOT is now available. For more details see the ATLFast++ page.

• How to organize a program in modules (the Makers).
• How to mix compiled and interpreted code.
• How to manage histograms in each module.
• How to use the TClonesArray class to store results.
• How to create a Root Tree using the TClonesArray.
• How to save the Run parameters in the output file.
• How to call Fortran from C++.
• How to build an event display class.
• How to use the Root browser.

December 17, 1997:

Final ROOT Version 1.03 Released (version tag 1.03/09)

The libraries on AFS have also been updated.

The ROOT team whishes you A Merry Christmas and a Happy and Successful 1998.

December 8, 1997:

Added link to the Rosebud Analysis Package used by theTAPS detector at GANIL

December 1, 1997:

Publication of "Questions & Answers" related to the comparison paper published Nov. 26

November 26, 1997:

First comparison between ROOT, Objectivity/DB and LHC++ histOOgrams

November 25, 1997:

Introduction of the development version 1.03/08

November 14, 1997:

Documentation Update

• Classes.ps (Class reference manual 650 pages)
• Overview.ps
• Tutorials.ps
• RootHtmlDoc . The Root html tree converted such that you can import a copy to your machine in the (likely) case that your network access is not adequate to browse directly our files.

November 8, 1997:

Introduction of the development version 1.03/07

HTML pages have been regenerated and correspond to this new version.

October 20, 1997:

Introduction of the development version 1.03/05

October 6, 1997:

First three parts of ROOT tutorial made available

September 10, 1997:

Introduction of the development version 1.03/03

September 4, 1997:

Introduction of the development version 1.03/02

August 22, 1997:

Introduction of the development version 1.03/01

August 14, 1997:

PostScript files and html documentation corresponding to version 1.02 are now available

July 28, 1997:

Final ROOT Version 1.02 Released (version tag 1.02/00)

• Shared memory facility. Objects can now be shared between different processes using shared memory.
• OpenGL viewer and OpenGL interface for all 3D ROOT objects.
• Macro search path.
• New TButton class which allows the interactive binding of any macro as action.
• New TH1::ProjectionX() and TH1::ProjectionY() member functions.
• Graphical tree cuts using new class TCutG.

July 28, 1997:

CINT Version 5.13/19 Released

Notice: ROOT v1.02 still runs with CINT v5.13.17. The new development version ROOT v1.03 will be released with the new CINT early September.

July 8, 1997:

Introduction of a powerful search engine

July 3, 1997:

Introduction of the development version 1.01/07

June 17, 1997:

Introduction of the development version 1.01/06

June 4, 1997:

Introduction of the development version 1.01/04

June 2, 1997:

CINT Version 5.13/11 Released

May 26, 1997:

Introduction of the development version 1.01/03

May 6, 1997:

Introduction of the development version 1.01/01

Thanks to Pasha Murat from the CDF collaboration at FNAL, the version 1.01/01 compiled with g++ is now available for SGI IRIX5.3.

May 2, 1997:

Introduction of the development version 1.01/00

The version 1.01 development notes are also available. We intend to update version 1.01 at regular intervals. We do not guarantee to have the export files ready for all supported machines. The two important things in 1.01 are:

• It is now possible to append data to a TTree saved in a file in a previous session.
• A problem in h2root has been fixed. A column name of the type "PX[NTRACK]" was converted to Px[ntrack] instead of Px[Ntrack]. You can disable the conversion to lower case in version 1.00 by setting the 4th parameter to 0.

April 25, 1997:

Final ROOT Version 1.00 Released (version tag 1.00/10)

On the Availability page, note the following:

• We now support HP-UX 10.20 (instead of version 10.10)
• We support the DEC CXX compiler under Alpha/Unix version 4.
• Version for AIX 3.2 is still the old version 0.9. Unless we get requests for this operating system in the coming days, we do not plan to support this old version of AIX anymore.
• We still support HP-UX version 9.05. We are planning to support only version 10.20 in the next release.
• We are receiving many requests to support g++ on SGI machines. We are looking for a machine with a decent response time to make the corresponding distribution.
• We have also requests for the SGI version under IRIX 6.4. This is a completly new operating system. We have access to a machine, but we cannot evaluate yet how much work is required.
• A version for Macintosh/PowerPC under MkLinux is available.
• The full ROOT source is available. The corresponding tar file does not yet include the autoconf facility currently under development by Matt Langston from SLAC.
• The documentation files (both html and Postscript will only be available early next week).

We would like to thank the many people who have sent comments, suggestions and bug reports. Please, keep doing so.

Verson 1.00 is only the beginning. Still a lot needs to be done. Read about our plans and let us know if you think something needs to be added. We are now heading for version 2.00.

April 18, 1997:

Introduction of the Second Beta (version 1.00/08)

April 5, 1997:

Introduction of the First Beta (version 1.00/07)

Please test this new version and report problems or suggestions as soon as possible. We still have to include a few additions before the final release scheduled for end of April.

A summary of the main features will be posted later. Note a backward incompatibility with respect to version 0.9 in the way TTree branches are defined. The test program Event and macros eventa and eventb have been modified accordingly.

Next week, we are presenting the ROOT Input/Output subsystem to the CHEP97 conference in Berlin. The tar files including the slides and also the ROOT macro generating these slides can be found (from Tuesday 8) at CHEP97 slides.

March 17, 1997:

Digest of roottalk Mailing List Available via ROOT Home Page

March 7, 1997:

The ALICE Collaboration Adopts ROOT as Physics Analysis Framework

January 15, 1997:

Dedicated ROOT Mailing List roottalk Created

subscribe roottalk [preferred mail address]

January 14, 1997:

ROOT Version 0.90/12 Released

• Many new features in the TTree class. Have a look at the Event example.
• Utility program h2root to convert HBOOK files to ROOT files.
• A graphical object browser.
• ROOT can run in batch mode.
• ROOT command line input and output can be redirected.
• Database auto-save and recovery features.
• Network classes allowing object hierarchies to be transfered between client/server.
• Addtional supported platforms: SGI IRIX 5.3 and Solaris on Intel PC.
• Removed last commercial component. On Linux ROOT works now fine with LessTif.
• New I/O benchmarks.

We hope you will have fun working with ROOT and welcome any suggestions, comments and bug reports.

December 20, 1996:

ROOT Available for SGI IRIX 5.3

December 4, 1996:

ROOT Version 0.9/09 Pre-release

The AFS files are still version 0.8, they will only be changed once the final release has been made.

ATTENTION: if you have been using version 0.8 or earlier you must replace the ROOTDIR environment variable by ROOTSYS and remove all other ROOT related variables, like ROOTLIB and ROOTSRC.

September 19, 1996:

ROOT Version 0.8/04 Update

• Fix a bug in TFormula constructor. Remove function with "name" instead of "expression" in the list of functions. Another problem fixed in TFormula::Analyze (missing statement fNpar += npold; in case of a reference to an existing formula with parameters.
• Fix a problem in TPad::Print. If one prints a canvas from the file menu and this is not the current canvas, the PostScript parameters are taken from the current canvas and not from this canvas. (bug reported by C.Roland).
• Protect TBranch::TBranch in case a ntuple/tree is created and no file is open. (problem reported by C.Bormann).
• Fix a problem in TH1::PaintInit when superimposing an histogram on top of an existing histogram in a canvas with LogY scale. (thanks to Detlef Imrscher).

September 1, 1996:

ROOT Version 0.8 Released

• Integration of a full C/C++ interpreter
• Rootcint dictionary generator
• Consolidated I/O subsystem
• Many new graphics features and improved GUI
• Dynamic linking of shared libraries
• Extended documentation, examples and tutorials

August 26, 1996:

CINT Version 5.10 Released

June 13, 1996:

CINT Version 5.8 Released

June 4, 1996:

Several WEB Pages Updated. PostScript version of Documentation Now Available

• The CINT C/C++ Interpreter and Dictionary generator.
• The Runtime Type Information System.
• Documentation in PostScript and HTML formats.

Note that the existing WEB pages describe our coming version 0.8. We expect to release this new version end of June.

April 16, 1996:

Version 0.07 Now Available on Most Unix Systems and Windows/NT

The new set of tutorials based on our new full C++ interpreter is available in the tutorials section.

We intend to provide in the coming days the complete ROOT html tree as one or a few PostScript files. Stay tuned!

March 25, 1996:

Give Feedback to the ROOT Team Via the New Bug Report and Feedback Forms

February 28, 1996:

ROOT Version 0.06b1 for HP-UX Now Available

February 21, 1996:

CINT Version 5.4 Released

February 14, 1996:

Monday 19 February, 16:00, CN Amphi: Presentation of CINT, a C/C++ interpreter, by M. Goto.

February 5, 1996:

ROOT Version 0.05 Released

November 29, 1995:

ROOT Version 0.04 Released

First Public Presentation of ROOT at CERN