Accessing ROOT fit result

Hi,

I have a TH1F called h and would like to fit a Gaussian to it. Additionally I would like to access the TFitResult. According to ROOT's documentation (http://root.cern.ch/root/html/TH1.html#TH1:Fit) this ought to work like this:

TFitResultPtr fitres = h->Fit("gaus", "S", "", -0.1, 0.5); Double_t chi2 = fitres->Chi2();

Only it doesn't: The second line yields

  Error: Symbol fitres is not defined in current scope (tmpfile):1:   Error: Failed to evaluate fitres->Chi2()

• Interpreter error recovered ***

What's wrong here?

Best regards,
Alexander Received on Tue Dec 15 2009 - 12:30:33 CET