root:example_ttree
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| root:example_ttree [2017/06/12 21:51] – iwn | root:example_ttree [2017/06/22 15:25] (current) – iwn | ||
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| Line 1: | Line 1: | ||
| - | Below is an example on the use of '' | + | Below is an example on the use of '' |
| < | < | ||
| - | python trees.py | + | $ python trees.py |
| + | </ | ||
| + | and check output with | ||
| + | < | ||
| + | $ root -l tree.root | ||
| + | root [1] TBrowser a | ||
| </ | </ | ||
| - | + | <code python trees.py> | |
| - | <code python | + | |
| #! / | #! / | ||
| Line 11: | Line 15: | ||
| start = time.time() | start = time.time() | ||
| - | from ROOT import gRandom, TFile, TTree, TH1D, TObject | + | from ROOT import gRandom, TFile, TTree, TH1D |
| from array import array | from array import array | ||
| import numpy # alternative to array | import numpy # alternative to array | ||
| Line 74: | Line 78: | ||
| # overwrite the tree in the output file and close the file | # overwrite the tree in the output file and close the file | ||
| - | f.Write("", | + | f.Write("", |
| f.Close() | f.Close() | ||
| Line 93: | Line 97: | ||
| h1.Fill(gRandom.Gaus(2, | h1.Fill(gRandom.Gaus(2, | ||
| - | f.Write("", | + | f.Write("", |
| f.Close() | f.Close() | ||
| Line 120: | Line 124: | ||
| h1.Fill(gRandom.Gaus(4, | h1.Fill(gRandom.Gaus(4, | ||
| - | f.Write("", | + | f.Write("", |
| f.Close() | f.Close() | ||
| Line 150: | Line 154: | ||
| t.Fill() | t.Fill() | ||
| - | f.Write("", | + | f.Write("", |
| f.Close() | f.Close() | ||
root/example_ttree.1497297072.txt.gz · Last modified: 2017/06/12 21:51 by iwn
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