I'm trying to project an ntuple into a histogram which I
defined so that I can control the number of bins used.
e.g.
TH1F h1 = new TH1F("blat", "quat", 20, 4.5, 6);
ntuple->Draw("m>>+h1", "(4.5<m)&&(m<6.0)");
h1->Draw();
I also tryed m>>h1, but the ntuple->Draw command always
picks its own choice for number of bins and h1 always
seems to remain empty. If I don't predefine h1 then it
gets created and properly filled but I don't have control
over the number of bins.
Is there a way to do this easily (i.e. without looping
trough the ntuple and filling the histogram event by event)?
Thanks.
Stephen Bailey