Hi Matt, See my reply to the same question at http://root.cern.ch/root/roottalk/roottalk02/2279.html Rene Brun On Wed, 5 Jun 2002, Matt Fritts wrote: > I have been fitting TH1 spectral data to a user-defined function. In the > past I have used the parameter errors for the fit values. For current > work I find that I need to know the correlation of the errors of > different paramaters. I understand that for this I must know the values > of different terms in the error matrix. > > How do I extract values from the error matrix after using "fit" for a > TH1? I see in the reference guide that TMinuit has a member "mnemat"... > but I am not using TMinuit directly. > > Thanks in advance for your help! > > Matt Fritts > University of Toledo >
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