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ROOT Version: 6.24/02
Platform: Ubuntu 20.04
Compiler: gcc 9.3.0
Dear ROOT experts,
I want to plot a histogram with different bin width, for example
I don’t know how to plot the histogram like this. The TH1 class contains a method called TH1::Rebin(). However, this method can only rebin the histogram globally. I just need to merge some bins in the histogram.
Hi @zzl0024; let us know whether you still have problems for this after taking a look to the guide mentioned by @yus.
You can “merge some bins in the histogram”.
See the “case 2 xbins!=0” in the TH1::Rebin method description.
A simple example can be found in this post.
Thank you! Your method is also very useful. If I want to plot a histogram from a TTree, I can only use this method to plot the histogram with variable bin width.
If you want to make a projection of a tree then it is a better idea to create a histogram with the desired (variable) binning in advance.
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