Plot the bincontents of two TH1D histograms as (x,y) points

I have two histograms,
I want to plot the Bin Contents of h1 and h2 as (x,y) co-ordinates. How should I do it?

ROOT Version: 6.24
Platform: Focal Release 20.04
Compiler: C++

This is not possible (you would need a TH2D which cannot be built from two TH1D).

Corresponding to each of h1 and h2, we have i-th bin and its BinContent(i). Is it not possible to extract their BinContent(i) and plot them as x and y set of points?

This you can do: TGraph

// assuming both histograms have the same number of bins
TGraph *g = new TGraph(h1->GetNbinsX(), h1->GetArray() + 1, h2->GetArray() + 1);

If you also want the underflow and overflow bins, use:

TGraph *g = new TGraph(h1->GetNbinsX() + 2, h1->GetArray(), h2->GetArray());

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.