gr103_zones.py

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## \file
## \ingroup tutorial_graphs
## \notebook
## Example of script showing how to divide a canvas
## into adjacent subpads + axis labels on the top and right side
## of the pads. Original tutorial by Rene Brun.
##
## See the [Divide documentation](https://root.cern/doc/master/classTPad.html#a2714ddd7ba72d5def84edc1fbaea8658)
##
## Note that the last 2 arguments in
##       c1->Divide(2,2,0,0)
## define 0 space between the pads. With this, the axis labels where the pads
## touch may be cut, as in this tutorial. To avoid this, either add some spacing
## between pads (instead of 0) or change the limits of the plot in the pad (histos
## in this tutorial). E.g. h3 could be defined as
## TH2F *h3 = new TH2F("h3","test3",10,0,1,22,-1.1,1.1);
## but note that this can change the displayed axis labels (requiring SetNdivisions
## to readjust).
##
## SetLabelOffset changes the (perpendicular) distance to the axis. The label
## position along the axis cannot be changed
## \macro_image
## \macro_code
## \author Alberto Ferro
 
import ROOT
 
c1 = ROOT.TCanvas("c1","multipads",900,700)
ROOT.gStyle.SetOptStat(0)
 
c1.Divide(2,2,0,0)
h1 = ROOT.TH2F("h1","test1",10,0,1,20,0,20)
h2 = ROOT.TH2F("h2","test2",10,0,1,20,0,100)
h3 = ROOT.TH2F("h3","test3",10,0,1,20,-1,1)
h4 = ROOT.TH2F("h4","test4",10,0,1,20,0,1000)
 
c1.cd(1)
ROOT.gPad.SetTickx(2)
h1.Draw()
c1.cd(2)
ROOT.gPad.SetTickx(2)
ROOT.gPad.SetTicky(2)
h2.GetYaxis().SetLabelOffset(0.01)
h2.Draw()
c1.cd(3)
h3.Draw()
c1.cd(4)
ROOT.gPad.SetTicky(2)
h4.Draw()