I have fit a distribution with sum of few functions.
The functions are added with RooAddPdf module.
When I add functions, the arguments are integrate yield.
But what I want to call is coefficient of each function.
RooAddPdf* model = new RooAddPdf(“model”, “1S+2S+3S+Bkg”, RooArgList(*Signal1S, *Signal2S, *Signal3S, *Background), RooArgList(*nSig1S, *nSig2S, *nSig3S, *nBkg));
nSig1S, nSig2S, nSig3S, nBkg are arguments.
Maybe it is added like following
aSignal1S + bSignal2S + cSignal3S + dBackgrouund
The a, b, c, d are what I want to call.
How can I get them in this case?