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author | qiping.lqp <qiping.lqp@alibaba-inc.com> | 2014-09-15 17:43:26 -0700 |
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committer | Xiangrui Meng <meng@databricks.com> | 2014-09-15 17:43:26 -0700 |
commit | fdb302f49c021227026909bdcdade7496059013f (patch) | |
tree | eb9136a917317cf4777f01454436784d89496448 /mllib/src/main | |
parent | 983d6a9c48b69c5f0542922aa8b133f69eb1034d (diff) | |
download | spark-fdb302f49c021227026909bdcdade7496059013f.tar.gz spark-fdb302f49c021227026909bdcdade7496059013f.tar.bz2 spark-fdb302f49c021227026909bdcdade7496059013f.zip |
[SPARK-3516] [mllib] DecisionTree: Add minInstancesPerNode, minInfoGain params to example and Python API
Added minInstancesPerNode, minInfoGain params to:
* DecisionTreeRunner.scala example
* Python API (tree.py)
Also:
* Fixed typo in tree suite test "do not choose split that does not satisfy min instance per node requirements"
* small style fixes
CC: mengxr
Author: qiping.lqp <qiping.lqp@alibaba-inc.com>
Author: Joseph K. Bradley <joseph.kurata.bradley@gmail.com>
Author: chouqin <liqiping1991@gmail.com>
Closes #2349 from jkbradley/chouqin-dt-preprune and squashes the following commits:
61b2e72 [Joseph K. Bradley] Added max of 10GB for maxMemoryInMB in Strategy.
a95e7c8 [Joseph K. Bradley] Merge remote-tracking branch 'upstream/master' into chouqin-dt-preprune
95c479d [Joseph K. Bradley] * Fixed typo in tree suite test "do not choose split that does not satisfy min instance per node requirements" * small style fixes
e2628b6 [Joseph K. Bradley] Merge remote-tracking branch 'upstream/master' into chouqin-dt-preprune
19b01af [Joseph K. Bradley] Merge remote-tracking branch 'chouqin/dt-preprune' into chouqin-dt-preprune
f1d11d1 [chouqin] fix typo
c7ebaf1 [chouqin] fix typo
39f9b60 [chouqin] change edge `minInstancesPerNode` to 2 and add one more test
c6e2dfc [Joseph K. Bradley] Added minInstancesPerNode and minInfoGain parameters to DecisionTreeRunner.scala and to Python API in tree.py
0278a11 [chouqin] remove `noSplit` and set `Predict` private to tree
d593ec7 [chouqin] fix docs and change minInstancesPerNode to 1
efcc736 [qiping.lqp] fix bug
10b8012 [qiping.lqp] fix style
6728fad [qiping.lqp] minor fix: remove empty lines
bb465ca [qiping.lqp] Merge branch 'master' of https://github.com/apache/spark into dt-preprune
cadd569 [qiping.lqp] add api docs
46b891f [qiping.lqp] fix bug
e72c7e4 [qiping.lqp] add comments
845c6fa [qiping.lqp] fix style
f195e83 [qiping.lqp] fix style
987cbf4 [qiping.lqp] fix bug
ff34845 [qiping.lqp] separate calculation of predict of node from calculation of info gain
ac42378 [qiping.lqp] add min info gain and min instances per node parameters in decision tree
Diffstat (limited to 'mllib/src/main')
4 files changed, 11 insertions, 9 deletions
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala index 4343124f10..fa0fa69f38 100644 --- a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala +++ b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala @@ -303,7 +303,9 @@ class PythonMLLibAPI extends Serializable { categoricalFeaturesInfoJMap: java.util.Map[Int, Int], impurityStr: String, maxDepth: Int, - maxBins: Int): DecisionTreeModel = { + maxBins: Int, + minInstancesPerNode: Int, + minInfoGain: Double): DecisionTreeModel = { val data = dataBytesJRDD.rdd.map(SerDe.deserializeLabeledPoint) @@ -316,7 +318,9 @@ class PythonMLLibAPI extends Serializable { maxDepth = maxDepth, numClassesForClassification = numClasses, maxBins = maxBins, - categoricalFeaturesInfo = categoricalFeaturesInfoJMap.asScala.toMap) + categoricalFeaturesInfo = categoricalFeaturesInfoJMap.asScala.toMap, + minInstancesPerNode = minInstancesPerNode, + minInfoGain = minInfoGain) DecisionTree.train(data, strategy) } diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala index 56bb881210..c7f2576c82 100644 --- a/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala +++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala @@ -389,7 +389,7 @@ object DecisionTree extends Serializable with Logging { var groupIndex = 0 var doneTraining = true while (groupIndex < numGroups) { - val (tmpRoot, doneTrainingGroup) = findBestSplitsPerGroup(input, metadata, level, + val (_, doneTrainingGroup) = findBestSplitsPerGroup(input, metadata, level, topNode, splits, bins, timer, numGroups, groupIndex) doneTraining = doneTraining && doneTrainingGroup groupIndex += 1 @@ -898,7 +898,7 @@ object DecisionTree extends Serializable with Logging { } }.maxBy(_._2.gain) - require(predict.isDefined, "must calculate predict for each node") + assert(predict.isDefined, "must calculate predict for each node") (bestSplit, bestSplitStats, predict.get) } diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala index 31d1e8ac30..caaccbfb8a 100644 --- a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala +++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala @@ -77,6 +77,8 @@ class Strategy ( } require(minInstancesPerNode >= 1, s"DecisionTree Strategy requires minInstancesPerNode >= 1 but was given $minInstancesPerNode") + require(maxMemoryInMB <= 10240, + s"DecisionTree Strategy requires maxMemoryInMB <= 10240, but was given $maxMemoryInMB") val isMulticlassClassification = algo == Classification && numClassesForClassification > 2 diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Predict.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Predict.scala index 6fac2be279..d8476b5cd7 100644 --- a/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Predict.scala +++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Predict.scala @@ -17,18 +17,14 @@ package org.apache.spark.mllib.tree.model -import org.apache.spark.annotation.DeveloperApi - /** - * :: DeveloperApi :: * Predicted value for a node * @param predict predicted value * @param prob probability of the label (classification only) */ -@DeveloperApi private[tree] class Predict( val predict: Double, - val prob: Double = 0.0) extends Serializable{ + val prob: Double = 0.0) extends Serializable { override def toString = { "predict = %f, prob = %f".format(predict, prob) |