[GitHub] spark pull request #15415: [SPARK-14501][ML] spark.ml API for FPGrowth

[zhengruifeng <gi...@git.apache.org>]

Github user zhengruifeng commented on a diff in the pull request:

    https://github.com/apache/spark/pull/15415#discussion_r94715503
  
    --- Diff: mllib/src/main/scala/org/apache/spark/ml/fpm/AssociationRules.scala ---
    @@ -0,0 +1,113 @@
    +/*
    + * 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.ml.fpm
    +
    +import org.apache.spark.annotation.{Experimental, Since}
    +import org.apache.spark.ml.param.{DoubleParam, Param, ParamMap, Params}
    +import org.apache.spark.ml.util.Identifiable
    +import org.apache.spark.mllib.fpm.{AssociationRules => MLlibAssociationRules}
    +import org.apache.spark.mllib.fpm.FPGrowth.FreqItemset
    +import org.apache.spark.sql.{DataFrame, Dataset, SparkSession}
    +
    +/**
    + * :: Experimental ::
    + *
    + * Generates association rules from frequent itemsets ("items", "freq"). This method only generates
    + * association rules which have a single item as the consequent.
    + */
    +@Since("2.1.0")
    +@Experimental
    +class AssociationRules(override val uid: String) extends Params {
    +
    +  @Since("2.1.0")
    +  def this() = this(Identifiable.randomUID("AssociationRules"))
    +
    +  /**
    +   * Param for items column name. Items must be array of Integers.
    +   * Default: "items"
    +   * @group param
    +   */
    +  final val itemsCol: Param[String] = new Param[String](this, "itemsCol", "items column name")
    +
    +
    +  /** @group getParam */
    +  @Since("2.1.0")
    +  final def getItemsCol: String = $(itemsCol)
    +
    +  /** @group setParam */
    +  @Since("2.1.0")
    +  def setItemsCol(value: String): this.type = set(itemsCol, value)
    +
    +  /**
    +   * Param for frequency column name. Data type should be Long.
    +   * Default: "freq"
    +   * @group param
    +   */
    +  final val freqCol: Param[String] = new Param[String](this, "freqCol", "frequency column name")
    +
    +
    +  /** @group getParam */
    +  @Since("2.1.0")
    +  final def getFreqCol: String = $(freqCol)
    +
    +  /** @group setParam */
    +  @Since("2.1.0")
    +  def setFreqCol(value: String): this.type = set(freqCol, value)
    +
    +  /**
    +   * Param for minimum confidence, range [0.0, 1.0].
    +   * @group param
    +   */
    +  final val minConfidence: DoubleParam = new DoubleParam(this, "minConfidence", "min confidence")
    --- End diff --
    
    there should be a `ParamValidators.inRange(...)`


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