Dear experts,
Is it possible to define a linear combination of RooRealVar and pass that as the parameter of a pdf? To be more specific, I was thinking about a log-likelihood miminization like the following:
// These are the parameters to be minimized.
RooRealVar param1(“param1”,“param1”,0,-1000,1000)
RooRealVar param2(“param2”,“param2”,0,-1000,1000)
RooRealVar param3(“param3”,“param3”,0,-1000,1000)
RooRealVar param4(“param4”,“param4”,0,-1000,1000)
// Combine these in a linear combination.
RooRealVar lin_comb = aparam1 + bparam2 + cparam3 + dparam4;
RooRealVar x(“obs”,“obs”,0,100);
// Pass that linear combination as the mean of the Poisson PDF
RooPoisson model(“poisPdf”,“poisPdf”,x, lin_comb);
RooDataSet* data = some data.
RooAbsReal* nll = model.createNLL(*data, NumCPU(2));
RooMinuit roomin(*nll);
roomin.migrad();
Thank you very much.
Kind regards,
Pim