Piecewise fits

[YanXL]

Try this:

Piecewise function fits of TH1F

Hi all, I am trying to fit a combination of TF1’s to a ratio represented by a TH1F to make a piecewise fit parameterising this ratio for later use (an example of the ratio and fits in attachment). fit.pdf (29.6 KB) I tried using three separate TF1’s defined over three separate intervals to piece-wise define the various parts of the TH1F, but this naturally has discontinuities at the boundaries. I thought the way around this would be to define another function which was the combination of all…