[WIP] added comments to tree splitter code#8779

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andreh7 wants to merge 13 commits intoscikit-learn:masterfrom

andreh7:2017-04-tree-splitter-comments

Commits on Apr 22, 2017

added "end of loop comments" in tree/_splitter.pyx
andreh
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added comment where a feature is discovered to be constant in tree/_splitter.pyx
andreh
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added missing verb in comment
andreh
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added comment explaining how the range from which feature indices are randomly drawn is chosen
andreh
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fixed variable names in comments to match those used on the code: ...constant -> ...constants
andreh
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changed formatting of comments explaining the different areas in the features array
andreh
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added additional comment on range of known but not yet drawn area in the features array
andreh
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added a comment about swapping samples
andreh
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added a comment about presorted samples
andreh
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added comments in the section where a known constant feature was drawn
andreh
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added comments in the section where a not yet known constant feature was drawn
andreh
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added comment in the part where a feature was discovered to be constant in this node
andreh
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added comment in the part where a feature was discovered to be non-constant in this node
andreh
committed