def test_ntuple():
with TemporaryFile():
ntuple = Ntuple(('a', 'b', 'c'), name='test')
for i in range(100):
ntuple.Fill(gauss(.3, 2.), gauss(0, 1.), gauss(-1., 5))
ntuple.Write()
#!/usr/bin/env python
"""
=======================
A simple Ntuple example
=======================
This example demonstrates how to create a simple Ntuple.
"""
print __doc__
from rootpy.tree import Ntuple
from rootpy.io import root_open
from random import gauss
f = root_open("test.root", "recreate")
# create an ntuple with three float fields: a, b, c
ntuple = Ntuple(('a', 'b', 'c'), name="test")
# fill the ntuple with fake data
for i in xrange(20):
ntuple.Fill(gauss(.5, 1.), gauss(.3, 2.), gauss(13., 42.))
ntuple.write()
# write as CSV
ntuple.csv()
f.close()