How to count no. of entries per bin in a histogram?

ROOT
1

Dear All,
I want to count entries corresponding to each bin so that I can have idea which decay mode is contributing how much to the backgrounds. Could you please help me out with some sample code ?

Thanks.

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2

TH1::GetBinContent

3

Thanks for your reply. I am trying this hist1->GetBinContent(100);.
But it gives me nothing.
Shall I apply inside for loop ?

I want all the bin numbers to be printed with corresponding entries.
Please feel free to update my code.
modeadz.C (426 Bytes)

4

Your histogram has 80 bins in total, and you try to get the contents of the bin 100?

It seem to me that you want:
hist1->GetBinContent(hist1->FindFixBin(100.))

5

No, it is not showing me anything extra. I tried with hist1->GetBinContent(hist1->FindFixBin(100.));.
Just drawing the hist1 but not giving any extra information.

Thanks

6

Why would it show anything?
It seems to me you want:
std::cout << hist... << std::endl;

7

Right !
How can I apply a counter here so that it can keep on printing entries for all bins.

Thanks.

8

for (int i = 1; i <= hist1->GetNbinsX(); i++) std::cout << hist1->GetBinContent(i) << std::endl;

9

Thanks a lot. It did work.