Roofit output

ROOT
1

I am trying to figure out whether roofit converged in this fit I am doing. The output says:

[quote] MIGRAD MINIMIZATION HAS CONVERGED.
MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
MINUIT WARNING IN HESSE
============== Negative diagonal element 11 in Error Matrix
MINUIT WARNING IN HESSE
============== 3.16792 added to diagonal of error matrix
COVARIANCE MATRIX CALCULATED SUCCESSFULLY
MIGRAD TERMINATED WITHOUT CONVERGENCE.[/quote]

So, I don’t really know if it converged or not. See the attached log file. Can someone explain to me what this output means?

Thanks.
roofit_output.txt (58.7 KB)

2

This problem with roofit seems to happen a lot…

Is there a separate forum for roofit that I should use?

3

HI,

Yes, you should use the Math and Stats forum.

Cheers,
Philippe.