ROOT
v6-26
Reference Guide
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first.py
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1
## \file
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## \ingroup tutorial_pyroot_legacy
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## \notebook
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## My first PyROOT interactive session
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##
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## \macro_image
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## \macro_code
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##
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## \author Wim Lavrijsen
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from
ROOT
import
TCanvas, TF1, TPaveLabel, TPad, TText
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from
ROOT
import
gROOT
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nut =
TCanvas
(
'nut'
,
'FirstSession'
, 100, 10, 700, 900 )
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nut.Range( 0, 0, 20, 24 )
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nut.SetFillColor( 10 )
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nut.SetBorderSize( 2 )
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pl =
TPaveLabel
( 3, 22, 17, 23.7,
'My first PyROOT interactive session'
,
'br'
)
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pl.SetFillColor( 18 )
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pl.Draw()
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t =
TText
( 0, 0,
'a'
)
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t.SetTextFont( 62 )
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t.SetTextSize( 0.025 )
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t.SetTextAlign( 12 )
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t.DrawText( 2, 20.3,
'PyROOT provides ROOT bindings for Python, a powerful interpreter.'
)
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t.DrawText( 2, 19.3,
'Blocks of lines can be entered typographically.'
)
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t.DrawText( 2, 18.3,
'Previous typed lines can be recalled.'
)
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t.SetTextFont( 72 )
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t.SetTextSize( 0.026 )
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t.DrawText( 3, 17,
r'>>> x, y = 5, 7'
)
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t.DrawText( 3, 16,
r'>>> import math; x*math.sqrt(y)'
)
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t.DrawText( 3, 14,
r'>>> for i in range(2,7): print "sqrt(%d) = %f" % (i,math.sqrt(i))'
)
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t.DrawText( 3, 10,
r'>>> import ROOT; f1 = ROOT.TF1( "f1", "sin(x)/x", 0, 10 )'
)
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t.DrawText( 3, 9,
r'>>> f1.Draw()'
)
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t.SetTextFont( 81 )
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t.SetTextSize( 0.018 )
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t.DrawText( 4, 15,
'13.228756555322953'
)
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t.DrawText( 4, 13.3,
'sqrt(2) = 1.414214'
)
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t.DrawText( 4, 12.7,
'sqrt(3) = 1.732051'
)
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t.DrawText( 4, 12.1,
'sqrt(4) = 2.000000'
)
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t.DrawText( 4, 11.5,
'sqrt(5) = 2.236068'
)
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t.DrawText( 4, 10.9,
'sqrt(6) = 2.449490'
)
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pad =
TPad
(
'pad'
,
'pad'
, .2, .05, .8, .35 )
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pad.SetFillColor( 42 )
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pad.SetFrameFillColor( 33 )
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pad.SetBorderSize( 10 )
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pad.Draw()
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pad.cd()
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pad.SetGrid()
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f1 =
TF1
(
'f1'
,
'sin(x)/x'
, 0, 10 )
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f1.Draw()
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nut.cd()
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nut.Update()
TCanvas
The Canvas class.
Definition
TCanvas.h:23
TF1
1-Dim function class
Definition
TF1.h:213
TPad
The most important graphics class in the ROOT system.
Definition
TPad.h:26
TPaveLabel
A Pave (see TPave) with a text centered in the Pave.
Definition
TPaveLabel.h:20
TText
Base class for several text objects.
Definition
TText.h:22
tutorials
legacy
pyroot
first.py
ROOT v6-26 - Reference Guide Generated on Mon Sep 11 2023 21:03:03 (GVA Time) using Doxygen 1.9.8