Hi Alexander, The error matrix is not available via TF1. You can get the error matrix immediatly after having called TH1::Fit (or TGraph::Fit) with, eg const int npar = 5; // your number of parameters double matrix[npar][npar]; gMinuit->mnemat(&matrix[0][0],npar); Rene Brun On Wed, 29 May 2002, Alexander Kupco wrote: > Hello, > > is there any way how to access error matrix of the fitted function? > TF1 class has method > for getting errors of fitted parameters, is there a similar function for > correlation matrix? > > Thanks, > > Alexander Kupco >
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