Hi rooters! I try to do the following: I have a TNtuple out of which I'd like to dump two quantities into a TH2F histogram with a predefined binning. (If I don't demand this, the mid located bins get united.) If however I create a TH2F with appropriate binning and type: myNtuple->Draw("val1:val2>>my2DHistogram","myCut"); the histogram is drawn empty. If I type: myNtuple->Draw("val1>>my1DHistogram","myCut"); the binning is automatically right for the values val1 can take. Is there something I do wrong and a way to do this except filling the TH2F from the very beginning? Greetings! Tassilo ------------------------------------------------------------------------------- Tassilo Christ State University of NY at Stony Brook PHENIX-Experiment at BNL Campus: Private: Department of Physics and Astronomy Schomburg A 112 - C, Office C116 350 North Loop Road 11790 Stony Brook, NY Telephone 516-632-9007 Telephone 516-216-5106 BNL- phone: 516 - 344 - 5455 "Microsoft spel chekker four sail, worx grate!" "A world without walls and fences could live without Windows and Gates..." And my personal favourite: esa$ gcc -Wall -o ariane5 ariane4.c ariane4.c: 666: warning: long float implicitly truncated to unsigned type esa$ ariane5 :-> -------------------------------------------------------------------------------
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