Draw in aliroot, attached file, histograms

ROOT
#1

Hello,

i have a root file with with entries in a folder “sig” with the format (x,y,z,q).
When i use
aliroot (rootfilename)
and
sig->Draw(“x”)
i get a histogram with x coord vs. number of entries.
Now my question:
How can i plot 2- and 3-dimensional histograms (like x,y,q)or lets say all (x,y,z) with q>threshold?

Thanks in advance.

#2

See the TTree::Draw documentation (and the User’s Guide):

sig->Draw("x:y"); sig->Draw("x:y:q"); sig->Draw("x:y:z",Form("q>%f", threshold);

Cheers,
Philippe