Logo ROOT   6.18/05
Reference Guide
Namespaces
first.py File Reference

Namespaces

namespace  first
 

Detailed Description

View in nbviewer Open in SWAN My first PyROOT interactive session

from ROOT import TCanvas, TF1, TPaveLabel, TPad, TText
from ROOT import gROOT
nut = TCanvas( 'nut', 'FirstSession', 100, 10, 700, 900 )
nut.Range( 0, 0, 20, 24 )
nut.SetFillColor( 10 )
nut.SetBorderSize( 2 )
pl = TPaveLabel( 3, 22, 17, 23.7, 'My first PyROOT interactive session', 'br' )
pl.SetFillColor( 18 )
pl.Draw()
t = TText( 0, 0, 'a' )
t.SetTextFont( 62 )
t.SetTextSize( 0.025 )
t.SetTextAlign( 12 )
t.DrawText( 2, 20.3, 'PyROOT provides ROOT bindings for Python, a powerful interpreter.' )
t.DrawText( 2, 19.3, 'Blocks of lines can be entered typographically.' )
t.DrawText( 2, 18.3, 'Previous typed lines can be recalled.' )
t.SetTextFont( 72 )
t.SetTextSize( 0.026 )
t.DrawText( 3, 17, r'>>> x, y = 5, 7' )
t.DrawText( 3, 16, r'>>> import math; x*math.sqrt(y)' )
t.DrawText( 3, 14, r'>>> for i in range(2,7): print "sqrt(%d) = %f" % (i,math.sqrt(i))' )
t.DrawText( 3, 10, r'>>> import ROOT; f1 = ROOT.TF1( "f1", "sin(x)/x", 0, 10 )' )
t.DrawText( 3, 9, r'>>> f1.Draw()' )
t.SetTextFont( 81 )
t.SetTextSize( 0.018 )
t.DrawText( 4, 15, '13.228756555322953' )
t.DrawText( 4, 13.3, 'sqrt(2) = 1.414214' )
t.DrawText( 4, 12.7, 'sqrt(3) = 1.732051' )
t.DrawText( 4, 12.1, 'sqrt(4) = 2.000000' )
t.DrawText( 4, 11.5, 'sqrt(5) = 2.236068' )
t.DrawText( 4, 10.9, 'sqrt(6) = 2.449490' )
pad = TPad( 'pad', 'pad', .2, .05, .8, .35 )
pad.SetFillColor( 42 )
pad.SetFrameFillColor( 33 )
pad.SetBorderSize( 10 )
pad.Draw()
pad.cd()
pad.SetGrid()
f1 = TF1( 'f1', 'sin(x)/x', 0, 10 )
f1.Draw()
nut.cd()
nut.Update()
The Canvas class.
Definition: TCanvas.h:31
1-Dim function class
Definition: TF1.h:211
The most important graphics class in the ROOT system.
Definition: TPad.h:29
A Pave (see TPave) with a text centered in the Pave.
Definition: TPaveLabel.h:20
Base class for several text objects.
Definition: TText.h:23
Author
Wim Lavrijsen

Definition in file first.py.