Hello rooters, I would like to show you a small problem when a TProfile is displayed. In the joint ProfTest.root file, there is a TProfile named "prof" which was filled with very small Y values (typically around and below 1.e-4). When I plot it without scaling, I get uniform error bars which have no correlations with the real error bars. When I scale it with the command prof->Scale(100.) and draw it, the errors bars are correctly displayed for the small X values, but incorrectly diplsyed for high X values. When I apply an additional scaling via tp->Scale(10) (the original spectrum is now scale by a factor 1000) and draw it, the error bars are correctly displayed. It is as if a threshold on error values was set for the error bars display. Is this "normal"? Could it be eventually corrected? Thanks for your help Cheers -- Daniel CUSSOL LPC Caen Boulevard du Marechal Juin 14050 CAEN CEDEX e-mail : cussol@in2p3.fr Tel : +33-(0)2-31-45-29-73 FAX : +33-(0)2-31-45-25-49
This archive was generated by hypermail 2b29 : Thu Jan 01 2004 - 17:50:12 MET