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Reference Guide
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fit1.py
Go to the documentation of this file.
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## \file
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## \ingroup tutorial_pyroot
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## \notebook
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## Fit example.
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##
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## \macro_image
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## \macro_output
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## \macro_code
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##
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## \author Wim Lavrijsen
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import
ROOT
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from
os
import
path
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from
ROOT
import
TCanvas, TFile, TPaveText
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from
ROOT
import
gROOT, gBenchmark
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c1 =
TCanvas
(
'c1'
,
'The Fit Canvas'
, 200, 10, 700, 500 )
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c1.SetGridx()
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c1.SetGridy()
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c1.GetFrame().
SetFillColor
( 21 )
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c1.GetFrame().SetBorderMode(-1 )
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c1.GetFrame().
SetBorderSize
( 5 )
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gBenchmark.Start(
'fit1'
)
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#
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# We connect the ROOT file generated in a previous tutorial
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#
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File =
"py-fillrandom.root"
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if
(ROOT.gSystem.AccessPathName(File)) :
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ROOT.Info(
"fit1.py"
, File+
" does not exist"
)
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exit()
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fill =
TFile
(File)
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#
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# The function "ls()" lists the directory contents of this file
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#
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fill.ls()
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#
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# Get object "sqroot" from the file.
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#
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sqroot = gROOT.FindObject(
'sqroot'
)
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sqroot.Print()
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#
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# Now fit histogram h1f with the function sqroot
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#
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h1f = gROOT.FindObject(
'h1f'
)
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h1f.SetFillColor( 45 )
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h1f.Fit(
'sqroot'
)
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# We now annotate the picture by creating a PaveText object
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# and displaying the list of commands in this macro
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#
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fitlabel =
TPaveText
( 0.6, 0.3, 0.9, 0.80,
'NDC'
)
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fitlabel.SetTextAlign( 12 )
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fitlabel.SetFillColor( 42 )
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fitlabel.ReadFile(path.join(str(gROOT.GetTutorialDir()),
'pyroot'
,
'fit1_py.py'
))
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fitlabel.Draw()
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c1.Update()
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gBenchmark.Show(
'fit1'
)
SetFillColor
Option_t Option_t SetFillColor
Definition
TGWin32VirtualXProxy.cxx:50
TCanvas
The Canvas class.
Definition
TCanvas.h:23
TFile
A ROOT file is an on-disk file, usually with extension .root, that stores objects in a file-system-li...
Definition
TFile.h:53
TPaveText
A Pave (see TPave) with text, lines or/and boxes inside.
Definition
TPaveText.h:21
SetBorderSize
c SetBorderSize(2)
tutorials
pyroot
fit1.py
ROOT master - Reference Guide Generated on Wed Aug 14 2024 14:55:00 (GVA Time) using Doxygen 1.9.8