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[SPARK-4583] [mllib] LogLoss for GradientBoostedTrees fix + doc updates#3439

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jkbradley wants to merge 5 commits intoapache:masterapache/spark:masterfrom

jkbradley:gbt-loss-fixjkbradley/spark:gbt-loss-fixCopy head branch name to clipboard

Conversation Commits5 (5)Checks Files changed

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[SPARK-4583] [mllib] LogLoss for GradientBoostedTrees fix + doc updates#3439
jkbradley wants to merge 5 commits intoapache:masterfrom
jkbradley:gbt-loss-fix

Commits

Commits on Nov 25, 2014

Fixed LogLoss for GradientBoostedTrees, and updated doc for losses, forests, and boosting
jkbradley
committed
* Removed the 1/2 from SquaredError. This also required updating the test suite since it effectively doubles the gradient and loss.
jkbradley
committed

Commits on Nov 26, 2014

updated LogLoss (boosting) for numerical stability
jkbradley
committed
corrections to last log loss commit
jkbradley
committed
removed forgotten temp comments
jkbradley
committed

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