Template fitting in roofit


I want to do a template fitting using roofit. I have a TH1D data histogram and three MC template histograms of the same variable. I want to fit the data using these three templates and get the fractions in the data. I could not find any tutorial showing this?
It will be very helpful if some can point me to such an example.

with regards,

Hello @vineet.salar,

you should try a combination of
which is about importing histograms,
to construct templates
and then you need either the RooAddPdf or the RooRealSumPdf to add all the components. Here’s a tutorial where the RooAddPdf is used:

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