Github user mateiz commented on a diff in the pull request:
https://github.com/apache/spark/pull/364#discussion_r11509387
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/evaluation/binary/BinaryClassificationMetrics.scala
---
@@ -0,0 +1,204 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.evaluation.binary
+
+import org.apache.spark.rdd.{UnionRDD, RDD}
+import org.apache.spark.SparkContext._
+import org.apache.spark.mllib.evaluation.AreaUnderCurve
+import org.apache.spark.Logging
+
+/**
+ * Implementation of
[[org.apache.spark.mllib.evaluation.binary.BinaryConfusionMatrix]].
+ *
+ * @param count label counter for labels with scores greater than or equal
to the current score
+ * @param totalCount label counter for all labels
+ */
+private case class BinaryConfusionMatrixImpl(
+ count: LabelCounter,
+ totalCount: LabelCounter) extends BinaryConfusionMatrix with
Serializable {
+
+ /** number of true positives */
+ override def numTruePositives: Long = count.numPositives
--- End diff --
Just a minor question, do you want to call these numTruePositives or just
truePositives? Anyway I'm happy to merge it as is, just felt truePositives
would be shorter.
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