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root:pyroot_th1 [2017/06/26 17:38] – [Filling a histogram from a tree] iwn | root:pyroot_th1 [2017/09/05 10:34] – [Handling TH1 histograms] iwn | ||
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+ | [[root: | ||
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====== Handling TH1 histograms ====== | ====== Handling TH1 histograms ====== | ||
+ | |||
+ | [[https:// | ||
+ | |||
===== Importing ROOT classes ===== | ===== Importing ROOT classes ===== | ||
- | To use '' | + | To use '' |
<code python> | <code python> | ||
from ROOT import TH1D | from ROOT import TH1D | ||
hist = TH1D(" | hist = TH1D(" | ||
</ | </ | ||
- | or | + | or //all// classes: |
<code python> | <code python> | ||
from ROOT import * # loads all classes, and thus takes longer | from ROOT import * # loads all classes, and thus takes longer | ||
hist = TH1D(" | hist = TH1D(" | ||
</ | </ | ||
- | or | + | or only the '' |
<code python> | <code python> | ||
import ROOT | import ROOT | ||
Line 62: | Line 67: | ||
gROOT.Macro(" | gROOT.Macro(" | ||
... | ... | ||
- | tree.Draw(" | + | tree.Draw(" |
- | tree.Draw(" | + | tree.Draw(" |
</ | </ | ||