Problem Filling Errors of an histogram

ROOT
1

Helllo,

I’m trying to fill an histogram with BinContents and BinErrors from other histograms. What I do not understand is why the errors once the “new” histo is filled are bigger than those of departure.

As an example, I type:

[i] for(Int_t i=1; i < 10; i++){

AllMuonGenpT->SetBinContent(i,AllMuonGeneratedpT->GetBinContent(i));
AllMuonGenpT->SetBinError(i,AllMuonGeneratedpT->GetBinError(i));
AllMuonDetpT->SetBinContent(i,AllMuonDetectedpT->GetBinContent(i));
AllMuonDetpT->SetBinError(i,AllMuonGeneratedpT->GetBinError(i));
....
....

}[/i]

And taking a closer look to the process I see, as an example, for i = 2:

AllMuonDetectedpT->GetBinContent(i) = 4.774875e+06, AllMuonDetpT->GetBinContent(i) = 4.774875e+06,
AllMuonDetectedpT->GetBinError(i) = 2.000000e+00,
AllMuonDetpT->GetBinError(i) = 5.104556e+04

So errors change, and I do not understand why…
Could you help me, please?
Thanks in advance,

Regards,
Zaida

2

Hello,
I’m sorry, I found a mistake in my macro.
Regards,
Zaida