question about SetNormfactor in THStack

From: Zhijun Liang <Zhijun.Liang_at_cern.ch>
Date: Tue, 17 Oct 2006 15:42:10 +0200

dear rooters:
 I have question about how to normalize 1D histograms and then add them to THStack,  could you help me?
here is my code :
{
TH1F *h1=new TH1F("h1","h1",50,-6,6);
TH1F *h2=new TH1F("h2","h2",50,-6,6);

h1->FillRandom("gaus",1000);
h2->FillRandom("gaus",1000);
h1->SetNormFactor(10);
h2->SetNormFactor(10);

THStack *hs=new THStack("hs","hs");

hs->Add(h1);
hs->Add(h2);
hs->Draw();

}

I found that the THStack object failed to be normalized, do you know how to solve it ?
manys thanks in advance.
best regards
liang Received on Tue Oct 17 2006 - 15:42:16 MEST