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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