example.py

import ROOT
import mag

# setting up data samples
# mag.arr() function uses for setting up
# a double type to numbers in sample list
x1 = mag.arr(range(100))
x2 = mag.arr(map(lambda i: i/5., range(500)))
y1 = mag.arr(map(lambda i: i**0.5, x1))
y2 = mag.arr(map(lambda i: ROOT.TMath.Sin(i), x2))
c = ROOT.TCanvas()
# create graphs from data samples & setting up some properties
gr1 = ROOT.TGraph(len(x1), x1, y1)
gr1.SetTitle("y = #sqrt{x}")
gr1.SetLineWidth(2)
gr2 = ROOT.TGraph(len(x2), x2, y2)
gr2.SetTitle("y = sin(x)")
gr2.SetLineWidth(2)
gr2.SetLineColor(ROOT.kRed)
# create MultiAxisGraph object
MAG = mag.MultiAxisGraph()
# adding graphs to mag object
# mode "right" means, that graph will be scaled and represented with right axis
MAG.AddGraph(gr1)
MAG.AddGraph(gr2, mode="right")
# draw the mag object
MAG.Draw()
# accses to multigraph object in mag for setting style and attributes
mlt_graph = MAG.GetMultigraph()
mlt_graph.GetYaxis().SetTitle("axis for #sqrt{x} graph")
mlt_graph.GetXaxis().SetTitle("x")
mlt_graph.GetYaxis().SetRangeUser(-1., 11)
# accses to rigth axis for setting it's attributes
rigth_axis = MAG.GetRightAxis()
rigth_axis.SetTitle("axis for sin(x) graph")
rigth_axis.SetLineColor(ROOT.kRed)
rigth_axis.SetLabelFont(42)
rigth_axis.SetLabelSize(0.05)
rigth_axis.SetTitleFont(42)
rigth_axis.SetTitleSize(0.05)
# update the canvas so changes is applied
MAG.Update()