How to fill colour in roofit?

[couet]

You can find several examples on this forum. This one for instance:

RooFit: why FillStyle and FillColor don't work?

Hi, I just want to fill the signal with the red color and follow what it says on: http://root.cern.ch/root/html/RooAbsPdf.html#RooAbsPdf:plotOn But it doesn’t work. My code is in the following, is there something wrong? I am using root 5.18. And for the case of Minos, could we display the asymmetric errors with RooAbsPdf::paramOn? Thank you very much. [code]void testFill() { gSystem->Load(“libRooFit”); using namespace RooFit; RooRealVar *m = new RooRealVar( “m”, “invariant mass”, 5000…