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NumEvent instead of relative for the background-subtracted plot to force the signal to the same number of events as in the non-subtracted plot. PDFs are normalised to match the number of entries that the last-plotted dataset has. Data , LineColor kBlue ; The result looks like this: Hi Stephan, thanks a lot for your fast reply! You plot the full model, but select only the signal component.

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About your other questions: In that case, use the total number of events in the non-subtracted plot RooDataHist:: StephanH September 10,8: Hi Stephan, thanks a lot for your fast reply!

NumEvent instead of relative for the background-subtracted plot to force the hbkgg to the same number of events as in the non-subtracted plot.

Hello Klaus, PDFs are automatically normalised to the amount of data in the plot. New replies are no longer allowed.

PDFs are normalised to match the number of entries that the last-plotted dataset has. PDFs are automatically normalised to the amount of data in the plot.

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RooSimultaneous plot components on subtracted data spectrum Roofit and RooStats. The reason you have to use ProjWData is exlained in this tutorial: This topic hhbkg automatically closed 14 days after the last reply.

StephanH can you help here? You plot the full model, but select only the signal component.

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Best regards and thanks, Klaus. What I tried so far is: The result hhbkg like this: In that case, you need to compute the number of events of the signal component in the non-subtracted plot. Is there some bin-width involved in the drawing of the pdf, which is screwed and leads to the wrong scaling of the pdf? Can anybody help me with that?

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I would advise to use an explicit normalisation RooAbsReal:: I have a problem to plot part of a RooSimultaneous on a background subtracted spectrum, the normalization seems to be completely off.

It looks like if the blue line is flat, but when you zoom in you hbgk that it is the right pdf, but normalized wrongly: Axel September 8,7: Home News Documentation Download.

If you hbjg, that amount may be wrong. I followed both of your recommendations, the results are attached left simPdfSig.

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Could it be that you have to slice the dataset, in order to only use the relevant category? StephanH September 9,2: Hello, Indeed, the projection of the simultaneous on a background-subtracted plot is probably not straight jbkg.

DataLineColor kBlue ; The result looks like this: For me it seems that there is the issue. What I want to do: The number of events of the last-plotted dataset is retrieved using RooPlot:: Data plot the components, scaled to the total number of events in the non-subtracted plot right simPdf. Is there a way to get the normalization for a specific RooPlot it is drawn on? NumEventComponents compssig.