Fitting a distrete function to a histogram

Hello,

I have a function that produces a series of discrete points for some parameter, that i would like to fit to a series of data points.

So far i have tried interpolating the points with cubic splines to produce a continuous function, and fitting it with the the TH1F Fit method, after wrapping it in a TF1. The problem is that somtimes the cubic spline doesn’t appear to fit the points smoothly and i think this is upsetting TMinuit.

Does anyone have any suggestions on how to fit discrete points to histograms?

Thank-you,
Thomas

The problem was that the “I” option was set, and this was causing to use values that were not at the center of the bins. Though i am not sure what it is suppost to do