Hi,
I find that when the fill number is big, there is no result, for example
[quote]out_file = root_open(‘plot.root’,‘recreate’)
mh1 = TH1F(‘mh1’,‘mh1’,40,60,200)
for mass in chain_zhh:
mh1.Fill(mass.mh1)
mh1.Write()
mh1.Draw(‘C’)[/quote]
to plot a histogram, it’s usually no result( just a blank plot ). It’s wired . Anyone knows the reason?