Finding a RooCurve in a RooPlot

[Viesturs]

In the following situation:

RooPlot *frame;
...
frame -> Print();
printf("%p", frame -> getHist("shapeSig_b1_ttbar_morph_Norm"));

the output from frame->Print() is

frame_CMS_th1x_2cacf20[CMS_th1x] = (RooCurve::shapeSig_b1_ttbar_morph_Norm[CMS_th1x])

The RooCurve is visible when frame is drawn on a canvas, matching expectations.

However:

frame -> getHist("shapeSig_b1_ttbar_morph_Norm")

produces an error:

ERROR:InputArguments -- RooPlot::findObject(frame_CMS_th1x_2cacf20) cannot find object shapeSig_b1_ttbar_morph_Norm

or produces a nullptr

when called as

frame -> getHist("shapeSig_b1_ttbar_morph_Norm[CMS_th1x]")

How to properly address the RooCurve?

[oshadura]

perhaps @moneta or @vcroft can help here?

Thank you,
Oksana.

[vcroft]

Hi @Viesturs
when you make the plot you need to explicitly give the name

data.plotOn(frame, ROOT.RooFit.Name("data")) 

e.g. as seen here in cell 13

http://vincentcroft.web.cern.ch/vincentcroft/KaggleFit-WorkspaceBuilding.html