Venkatesh Kaushik wrote: > > 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? Yes. You are likely missing a sqrt somewhere Rene Brun > 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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