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mrt.py File Reference

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 mrt
 

Detailed Description

View in nbviewer Open in SWAN Build ROOT Ntuple from other source. This program reads the ‘aptuple.txt’ file row by row, then creates the Ntuple by adding row by row.

opening file /home/sftnight/build/workspace/root-makedoc-master/rootspi/rdoc/src/master.build/tutorials/pyroot/aptuple.txt ...
writing file aptuple.root ...
done
import sys, os
from ROOT import TFile, TNtuple, TROOT
ifn = os.path.join(str(TROOT.GetTutorialDir()), 'pyroot', 'aptuple.txt')
ofn = 'aptuple.root'
print('opening file %s ...' % ifn)
infile = open( ifn, 'r' )
lines = infile.readlines()
title = lines[0]
labels = lines[1].split()
print('writing file %s ...' % ofn)
outfile = TFile( ofn, 'RECREATE', 'ROOT file with an NTuple' )
ntuple = TNtuple( 'ntuple', title, ':'.join( labels ) )
for line in lines[2:]:
words = line.split()
row = map( float, words )
ntuple.Fill(*row)
outfile.Write()
print('done')
Author
Wim Lavrijsen

Definition in file mrt.py.

TNtuple
Definition: TNtuple.h:28
TROOT::GetTutorialDir
static const TString & GetTutorialDir()
Get the tutorials directory in the installation. Static utility function.
Definition: TROOT.cxx:3021
ROOT::Math::detail::open
@ open
Definition: GenVectorIO.h:55
TFile
Definition: TFile.h:54