Chi2 to histogram with bin-by-bin correlations

ROOT
1

Hello

I have a histogram which bins contents are correlated one to each other. Now I would like to fit a function to this histogram. By using the chi2 fit method I know how to include correlations in the fit, but I am wondering if we have that already implemented in ROOT, so I can provide the histogram and the correlation matrix and perform the fit.

Thanks,
Eduard

2

Hi,

we don’t have this yet implemented in ROOT. You have to write your self the chi2 function and then you can minimize it using Minuit

Best Regards

Lorenzo