How to use pyROOT 基礎編 その8

・直線を描く

   line = ROOT.TLine(start_x, start_y, end_x, end_y)
   line.Draw()

・長方形を描く

   box   = ROOT.TBox(start_x, start_y, end_x, end_y)
   box.Draw("SAME") 

・円を描く

    arc   = ROOT.TArc(center_x, center_y, radius)
    arc.Draw("SAME")

・楕円を描く

    ell   = ROOT.TEllipse( center_x, center_y, radius_x, radius_y)
    ell.Draw("SAME")

・マーカーを描く

    mark  = ROOT.TMarker( x, y, 20)
    mark.Draw("SAME")

・文字を入れる

    text  = ROOT.TText( start_x, start_y, "This is a pen." )
    text.Draw("SAME")

#/bin/usr/env python

import sys, os
import ROOT


if __name__=='__main__':


    graph = ROOT.TGraph()

    for x in range(10) :  
        np = graph.GetN()  
        graph.SetPoint(np, x, x)  

    cv = ROOT.TCanvas("cv", "Graphics Example", 200, 10, 700, 500)


    graph.SetLineWidth(3)  
    graph.SetLineColor(1)  
    graph.SetLineStyle(1)  
    graph.Draw("APC")

    line  = ROOT.TLine( 1, 3, 1, 8)
    line.SetLineWidth(3)  
    line.SetLineColor(2)  
    line.SetLineStyle(2)  
    line.Draw("SAME")

    box   = ROOT.TBox( 3, 1, 5, 2)
    box.SetFillColor(3)
    box.Draw("SAME")    

    arc   = ROOT.TArc( 5, 6, 2)
    arc.SetLineWidth(3)  
    arc.SetLineColor(4)  
    arc.SetLineStyle(1)  
    arc.Draw("SAME")

    ell   = ROOT.TEllipse( 8, 3, 1.3, 2)
    ell.SetLineWidth(3)
    ell.SetLineColor(6)  
    ell.SetLineStyle(1)  
    ell.Draw("SAME")

    mark  = ROOT.TMarker( 2, 3, 20 )
    mark.Draw("SAME")

    text  = ROOT.TText( 3, 9, "This is a pen." )
    text.Draw("SAME")

    cv.Update()


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