Hello,
So, what I want to do is to take some histogram, saved in a root file,
and use it in my program, and save it in the new output file from my
program. Looks easy. Here is my code:
int main(int argc, char* argv[])
{
TFile *flMC_file = new TFile("mc.root"); //the file in which I already
have my histogram (h1dNN) stored
TFile* file = TFile::Open("data.root", "RECREATE"); // my output file
TH1D* h1dMC_NN = (TH1D*)flMC_file->Get("h1dNN");
....
file->Write();
file->Close();
And the histogram is not in the file (but all other histograms created
later are there)
Do you have an idea what is the problem?
Cheers, Ivan
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