After fitting some function to some data one can retrieve the fit status via, e.g.
r = hSpectrumCalibration->Fit(f1, "R0MS");
status = r->Status();
But what do those values of status
actually mean?
So far I belive 0 is CONVERGED, negative values are FAILED and 4000 is OK.
But I could not find any information in the documentation [1] on that, beside other people asking for the same thing a year ago [2].
[1] https://root.cern.ch/root/html600ROOT__Fit__FitResult.html#ROOT__Fit__FitResult:Status
[2] Fit status documentation