所以我建立星火1.0.0隐式反馈推荐的模型,我试图按照他们有他们的协同过滤页面上的例子: http://spark.apache.org/docs/latest/mllib-collaborative-filtering.html#explicit-vs-implicit-feedback星火MLlib - 协同过滤隐饲料
而且我甚至有的测试数据集装起来它们在例如参考: http://codesearch.ruethschilling.info/xref/apache-foundation/spark/mllib/data/als/test.data
然而,当我尝试运行隐式反馈模型: VAL阿尔法= 0.01 VAL模型= ALS.trainImplicit(评分,秩,numIterations,阿尔法)
(收视率从他们的数据集和秩= 10,正是收视率numIterations = 20),我收到以下错误:
scala> val model = ALS.trainImplicit(ratings, rank, numIterations, alpha)
<console>:26: error: overloaded method value trainImplicit with alternatives:
(ratings: org.apache.spark.rdd.RDD[org.apache.spark.mllib.recommendation.Rating],rank: Int,iterations: Int)org.apache.spark.mllib.recommendation.MatrixFactorizationModel <and>
(ratings: org.apache.spark.rdd.RDD[org.apache.spark.mllib.recommendation.Rating],rank: Int,iterations: Int,lambda: Double,alpha: Double)org.apache.spark.mllib.recommendation.MatrixFactorizationModel <and>
(ratings: org.apache.spark.rdd.RDD[org.apache.spark.mllib.recommendation.Rating],rank: Int,iterations: Int,lambda: Double,blocks: Int,alpha: Double)org.apache.spark.mllib.recommendation.MatrixFactorizationModel <and>
(ratings: org.apache.spark.rdd.RDD[org.apache.spark.mllib.recommendation.Rating],rank: Int,iterations: Int,lambda: Double,blocks: Int,alpha: Double,seed: Long)org.apache.spark.mllib.recommendation.MatrixFactorizationModel
cannot be applied to (org.apache.spark.rdd.RDD[org.apache.spark.mllib.recommendation.Rating], Int, Int, Double)
val model = ALS.trainImplicit(ratings, rank, numIterations, alpha)
有趣的是,这种模式运行时没有做trainImplicit就好了(即ALS.train)
完美的,'神奇数字'计算似乎工作得很好!非常感谢你的帮助!! – atellez 2014-09-03 20:18:52
是的0.01对于lambda来说是一个很好的默认值。 – 2014-09-03 20:31:00