Log of /trunk/tree/tree/src/TEntryListBlock.cxx
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43271 -
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Modified
Wed Mar 7 05:53:52 2012 UTC (2 years, 10 months ago) by
pcanal
File length: 18127 byte(s)
Diff to
previous 35363
Add missing assign operator
Coverity number 35264,35265,35266,35267,35270,35273,35274,35275,
35281,35382,35383,35284,35285,35286,35286,35287,35288,35289,35290,35291,35292,35293,35294
35304,35305,35306,35307,35308,
35356,35371,35372,35378,35379,
35382
Revision
18856 -
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Modified
Tue May 22 13:47:43 2007 UTC (7 years, 8 months ago) by
brun
Original Path:
trunk/tree/src/TEntryListBlock.cxx
File length: 17341 byte(s)
Diff to
previous 18313
From Anna:
Changes in TEntryListBlock class to allow storing the indices of entries that don't pass. It's used when more than 15/16 of entries pass the selection, so it makes sense to store the non-passing entries as an array instead of storing passing entries as bits. Also, start calling OptimizeStorage() method after each Merge().
Revision
17422 -
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Modified
Mon Jan 22 07:57:14 2007 UTC (8 years ago) by
brun
Original Path:
trunk/tree/src/TEntryListBlock.cxx
File length: 13371 byte(s)
Diff to
previous 17235
From Anna:
Extend the functionality of TEntryList and add the following info in TTree::Draw
// Saving the result of Draw to a TEventList or a TEntryList
// =========================================================
// TTree::Draw can be used to fill a TEventList object (list of entry numbers)
// instead of histogramming one variable.
// If varexp0 has the form >>elist , a TEventList object named "elist"
// is created in the current directory. elist will contain the list
// of entry numbers satisfying the current selection.
// If option "entrylist" is used, a TEntryList object is created
// Example:
// tree.Draw(">>yplus","y>0")
// will create a TEventList object named "yplus" in the current directory.
// In an interactive session, one can type (after TTree::Draw)
// yplus.Print("all")
// to print the list of entry numbers in the list.
// tree.Draw(">>yplus", "y>0", "entrylist")
// will create a TEntryList object names "yplus" in the current directory
//
// By default, the specified entry list is reset.
// To continue to append data to an existing list, use "+" in front
// of the list name;
// tree.Draw(">>+yplus","y>0")
// will not reset yplus, but will enter the selected entries at the end
// of the existing list.
//
// Using a TEventList or a TEntryList as Input
// ===========================
// Once a TEventList or a TEntryList object has been generated, it can be used as input
// for TTree::Draw. Use TTree::SetEventList or TTree::SetEntryList to set the
// current event list
// Example1:
// TEventList *elist = (TEventList*)gDirectory->Get("yplus");
// tree->SetEventList(elist);
// tree->Draw("py");
// Example2:
// TEntryList *elist = (TEntryList*)gDirectory->Get("yplus");
// tree->SetEntryList(elist);
// tree->Draw("py");
// If a TEventList object is used as input, a new TEntryList object is created
// inside the SetEventList function. In case of a TChain, all tree headers are loaded
// for this transformation. This new object is owned by the chain and is deleted
// with it, unless the user extracts it by calling GetEntryList() function.
// See also comments to SetEventList() function of TTree and TChain.
//
// If arrays are used in the selection critera, the entry entered in the
// list are all the entries that have at least one element of the array that
// satisfy the selection.
// Example:
// tree.Draw(">>pyplus","fTracks.fPy>0");
// tree->SetEventList(pyplus);
// tree->Draw("fTracks.fPy");
// will draw the fPy of ALL tracks in event with at least one track with
// a positive fPy.
//
// To select only the elements that did match the original selection
// use TEventList::SetReapplyCut or TEntryList::SetReapplyCut.
// Example:
// tree.Draw(">>pyplus","fTracks.fPy>0");
// pyplus->SetReapplyCut(kTRUE);
// tree->SetEventList(pyplus);
// tree->Draw("fTracks.fPy");
// will draw the fPy of only the tracks that have a positive fPy.
//
// Note: Use tree->SetEventList(0) if you do not want use the list as input.
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