How to divide histograms with empty bins

ROOT
1

Hi everybody,

I attempt to divide two histograms having the same number of bins using:

histo->Divide(h1,h2,1,1,“B”)

Some of the bins are empty and, as a result, I get the following error:
“Attempt to divide histograms with different number of bins”.

Any way around without painfully dividing them bin-by-bin in a loop?

2

The problem is not with empty bins, but the fact that your histograms have different number of bins.

Rene

3

They do have the same number of bins. If I do h1.GetNbinsY() and equivalent for the X axis, I get the same numbers.

This is not strange if one takes into account that they are created by the same macro with different input parameters.

4

If you get the message “Attempt to divide histograms with different number of bins”"
your histograms that you want to divide have different numbers of bins. Please check your code

Rene

5

Attempting to produce a macro and a root file that I could upload for you, I found the problem. The division histogram had a different number of bins (x as y and other way around). The error message was misleading.
If you want I can upload the files.
Sorry for the trouble