Hi all, I need a way to average all the values in a vector, and I am using std::accumulate right now with no success… Here is a snippet of my code, the bold is the use of the vector v: std::vector<double> v; for(int g=0; g<8257; g++){ for (Long64_t j=0; j< 1000; j++) { Long6…

double sum = std::accumulate(v.begin(), v.end(), 0.0); v.clear(); double mean = sum / 941.; avg_compvch->Fill(g, mean);

still empty histogram :confused:

See what you get when you try: chchain->Draw("_ch_compression:_ch");

_ch vs _ch_compression is actually a different histogram that I also make in my script, and it comes out fine.

Well, you do not show your complete source code so I can only hope that you do “SetBranchAddress” for both branches (i.e. “_ch” and “_ch_compression”). If yes, I think you could simplify your code: TH1D *avg_compvch = new TH1D("avg_compvch", "avg_compvch", 8257, 0, 8257); for (Long64_t j = 0; j < …

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How to take average of vector values

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