Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/2847#discussion_r23273422
--- Diff: mllib/src/main/scala/org/apache/spark/mllib/fpm/FPGrowth.scala ---
@@ -0,0 +1,208 @@
+/*
+ * 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.fpm
+
+import org.apache.spark.Logging
+import org.apache.spark.SparkContext._
+import org.apache.spark.broadcast._
+import org.apache.spark.rdd.RDD
+
+import scala.collection.mutable.{ArrayBuffer, Map}
+
+/**
+ * This class implements Parallel FPGrowth algorithm to do frequent
pattern matching on input data.
+ * Parallel FPGrowth (PFP) partitions computation in such a way that each
machine executes an
+ * independent group of mining tasks. More detail of this algorithm can be
found at
+ * http://infolab.stanford.edu/~echang/recsys08-69.pdf
+ */
+class FPGrowth private(private var minSupport: Double) extends Logging
with Serializable {
+
+ /**
+ * Constructs a FPGrowth instance with default parameters:
+ * {minSupport: 0.5}
+ */
+ def this() = this(0.5)
--- End diff --
Is it too high? How do you set the default value?
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