Dear Jamie, Unfortunately I can't be present at the Minuit++ URD discussion 23-oct-1997. However, I had a look at the document of Zbyszek in trying to figure quickly out how I (in doing my physics analysis) could easily try out several different fits through my data points or distribution. I was not able (being a simple physicist) to get that from the URD.ps file; it looks too much as some writeup promising lots of things in future too me without telling what real functionality one can expect from it in doing the real (=physics analysis) work. So as input to the discussion I just can tell you here what functionality I would like to have. First of all : please make the documents available via some central WWW homepage, since from outside CERN going to some /afs directory to ftp the .ps file is a pain in the ass. 1) Having some data points or some distribution I would like to view the data in a plot first. 2) Now I would like to 'click' at the plot and obtain a menu from which I could select e.g. FIT. 3) Then a second menu should pop up in which I can select the boundaries of the fit and the fitting function (either some standard ones like Polynomial, Gaussian etc... or "user function") 4) Having selected a certain function I should be able to provide additional info (e.g. order of polynomial) or just provide the C++ code for a user function. 5) Clicking eventually on the "OK" button should perform the fit and show me the fit curve + parameter values in the same plot as my data points. 6) Clearly I would like to repeat steps 2)-5) to try out several functions, boundaries etc.... Bottom line : I want to get completely rid of this hastle of providing a FCN function as it was in the old FORTRAN case. However, the possibility of 'doing it the old way' (but then in C++) should still be there. The above is based on my experience in performing my complete WA93 direct photon analysis in C++ (using the ROOT framework) and it turned out that having these tools available has saved me a lot of time ! Cheers, Nick. *----------------------------------------------------------------------* Dr. Nick van Eijndhoven Department of Subatomic Physics email : nick@fys.ruu.nl Utrecht University / NIKHEF tel. +31-30-2532331 (direct) P.O. Box 80.000 tel. +31-30-2531492 (secr.) NL-3508 TA Utrecht fax. +31-30-2518689 The Netherlands WWW : http://www.fys.ruu.nl/~nick Office : Ornstein lab. 172 ---------------------------------------------------------------------- tel. +41-22-7679751 (direct) CERN PPE Division / ALICE exp. tel. +41-22-7675857 (secr.) CH-1211 Geneva 23 fax. +41-22-7679480 Switzerland CERN beep : 13+7294 Office : B 160 1-012 *----------------------------------------------------------------------*
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