How to subtract two histogram?

ROOT
1

Dear Rooters,
I want to plot residuals(data - MC). I draw data in hist2 and mc in hist1.
After that, I did something like following.

auto rp = new TRatioPlot(hist1, hist2);
rp->Draw();

which gives me the ratio but I want basically data-mc kind of thing which will be zero for good data-mc agreement.

Could you please suggest me which function I should use ?

Thanks and Regards

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2

Check out the 3 Add functions for histograms.

3

TRatioPlot *rp = new TRatioPlot(hist1, hist2, "diff"); // "diff" or "diffsig"

4

Thanks.
How can I draw different draw option for residual distribution ?

After adding these TRatioPlot class, TLegend is not working ?

How to resolve that ?

Thanks.

5

How Can I draw this residual in a different canvas ?

6

Difficult to answer without an example showing the “problem”.

7

TRatioPLot is in one single canvas. If you need two canvases do not use it. Make the difference yourself using Add and draw it in a separated canvas.

8

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