Hi, The values on the X- axis are in GeV, whereas the ones on the Y-axis are in MeV, so i multiplied the errors and mean-values on Y-axis by 0.001. to make both the axes be in same units. Is that a mistake? Venkat On Mon, 17 Nov 2003, Rene Brun wrote: > Hi, > > Your errors cannot be right. They are far too small. This makes the chisquare > too big. > Why do you multiply the errors by 0.001 ? > > Rene Brun > > Venkatesh Kaushik wrote: > > > > Hi ROOTers, > > I have two sets of data points, which I am supposed to fit straights line > > to. I try to fit both these with pol1, I observe two things > > 1) the chi square / dof value is horrible. > > 2) visually, i don't see the fit has done a good job. > > > > i am not sure what's happening. are there any default fit > > strategies/parameters that is messing up my fit? > > > > I have attached my code and the program output for your kind perusal. > > Thanks for the help. > > Venkat. > > > > -------------------------------------------------------------------------------- > > Name: Eliveonly_ecal.gif > > Eliveonly_ecal.gif Type: GIF Image (IMAGE/gif) > > Encoding: BASE64 > > > > Name: Ecal_live.C > > Ecal_live.C Type: Plain Text (TEXT/PLAIN) > > Encoding: BASE64 >
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