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Describe colsample_bylevel

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Maxim Grechkin 2016-02-29 16:59:58 -08:00
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doc/parameter.md
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@ -46,6 +46,9 @@ Parameters for Tree Booster
* colsample_bytree [default=1] * colsample_bytree [default=1]
- subsample ratio of columns when constructing each tree. - subsample ratio of columns when constructing each tree.
- range: (0,1] - range: (0,1]
* colsample_bylevel [default=1]
- subsample ratio of columns for each split, in each level.
- range: (0,1]
* lambda [default=1] * lambda [default=1]
- L2 regularization term on weights - L2 regularization term on weights
* alpha [default=0] * alpha [default=0]