Create a 2D histogram from two 1D histograms?

ROOT
1

I’m having several problems with 2D histograms, but I think it might be easier to just create them from preexisting histograms than try to solve those problems.

Is there a way to create a 2D histogram from two 1D histograms?

Thanks!

2

[quote]I’m having several problems with 2D histograms, [/quote]What are they?

[quote]Is there a way to create a 2D histogram from two 1D histograms[/quote]It depends, what is the semantic that you are looking for?

Cheers,
Philippe

3

I’ve fixed all but one… I’m not sure how to make the range variable (with 1D I’m just setting both the min and max to 0 and it does the rest).

I’m plotting a 1D histogram of “energy1” and a 1D histogram of “energy2.” Then separately I want to plot energy2 as a function of energy1. I thought instead of filling the 2D histogram in a loop I could fill it all at once with vectors from the two 1D histograms (which would eliminate my variable range problem, too, as I could use the range of the two 1D histograms).

Thanks so much!