Draw and illegal ranges

ROOT
1

Hi,

Apparently, when trying to draw a variable from a tree and output it to a histogram, as so:

f = TFile("myfile.root","r")
t = f.Get("myTree")
h = TH2F("h","",xbins,xmin,xmax,ybins,ymin,ymax)
t.Draw("varY:varX>>h","","")

in the special case ymin=ymax, the command h.Draw("axis") reports illegal ranges but h.Draw() doesn’t. Instead, h.Draw() rebins the data, keeping the same ybins but massaging the Y range for a “nice” plot.

Is that on purpose?

2

Search for “automatic bin” in the TH1 class description

3

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.