How to use pyROOT 応用編 その1

上下に2つのグラフを表示したいなー。

そんなときはこれを使うべし。

cv.Divide( 1, 2 )

view plainprint?

1. #/bin/usr/env python  
2.   
3. import sys, math  
4. import ROOT  
5.   
6. if __name__=='__main__':  
7.   
8.     # set graph1 style  
9.     graph1 = ROOT.TGraph()  
10.     graph1.SetLineWidth(2)  
11.     graph1.SetLineColor(4)  
12.     graph1.SetLineStyle(1)  
13.   
14.     # set graph2 style  
15.     graph2 = ROOT.TGraph()  
16.     graph2.SetLineWidth(2)  
17.     graph2.SetLineColor(3)  
18.     graph2.SetLineStyle(1)      
19.   
20.     # set title  
21.     graph1.SetTitle("Graph Test 2 top")  
22.     graph2.SetTitle("Graph Test 2 bottom")  
23.   
24.     # set data point  
25.     for x in range(10) :  
26.         np = graph1.GetN()  
27.         graph1.SetPoint(np, x, x**2)  
28.         graph2.SetPoint(np, x, x)  
29.   
30.     # open canvas  
31.     cv = ROOT.TCanvas("cv", "Graph Test", 800, 800)  
32.   
33.     # divide canvas to two  
34.     cv.Divide(1,2)  
35.       
36.     # top plot  
37.     pad = cv.cd(1)  
38.     pad.SetGridx(1)  
39.     pad.SetGridy(1)  
40.   
41.     # plot to top pannel  
42.     graph1.Draw("APC")  
43.   
44.     # set X axise of graph1  
45.     axisY = graph1.GetYaxis()  
46.     axisY.SetTitle("x**2")  
47.   
48.   
49.     # bottom plot  
50.     pad = cv.cd(2)  
51.     pad.SetGridx(1)  
52.     pad.SetGridy(1)  
53.   
54.     # plot to bottom pannel  
55.     graph2.Draw("APC")  
56.   
57.     # set Y axise of graph1  
58.     axisY = graph2.GetYaxis()  
59.     axisY.SetTitle("x")  
60.   
61.       
62.     # set X axis  
63.     axisX = graph2.GetXaxis()  
64.     axisX.SetTitle("x")  
65.   
66.   
67.     # export  
68.     cv.Print("graphtest2.png")  

#/bin/usr/env python

import sys, math
import ROOT

if __name__=='__main__':

    # set graph1 style
    graph1 = ROOT.TGraph()
    graph1.SetLineWidth(2)
    graph1.SetLineColor(4)
    graph1.SetLineStyle(1)

    # set graph2 style
    graph2 = ROOT.TGraph()
    graph2.SetLineWidth(2)
    graph2.SetLineColor(3)
    graph2.SetLineStyle(1)    

    # set title
    graph1.SetTitle("Graph Test 2 top")
    graph2.SetTitle("Graph Test 2 bottom")

    # set data point
    for x in range(10) :
        np = graph1.GetN()
        graph1.SetPoint(np, x, x**2)
        graph2.SetPoint(np, x, x)

    # open canvas
    cv = ROOT.TCanvas("cv", "Graph Test", 800, 800)

    # divide canvas to two
    cv.Divide(1,2)
    
    # top plot
    pad = cv.cd(1)
    pad.SetGridx(1)
    pad.SetGridy(1)

    # plot to top pannel
    graph1.Draw("APC")

    # set X axise of graph1
    axisY = graph1.GetYaxis()
    axisY.SetTitle("x**2")


    # bottom plot
    pad = cv.cd(2)
    pad.SetGridx(1)
    pad.SetGridy(1)

    # plot to bottom pannel
    graph2.Draw("APC")

    # set Y axise of graph1
    axisY = graph2.GetYaxis()
    axisY.SetTitle("x")

    
    # set X axis
    axisX = graph2.GetXaxis()
    axisX.SetTitle("x")


    # export
    cv.Print("graphtest2.png")