Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/597#discussion_r12334664
--- Diff:
examples/src/main/scala/org/apache/spark/examples/mllib/MovieLensALS.scala ---
@@ -99,7 +107,12 @@ object MovieLensALS {
val splits = ratings.randomSplit(Array(0.8, 0.2))
val training = splits(0).cache()
- val test = splits(1).cache()
+ val test = if (params.implicitPrefs) {
+ splits(1)
+ .map(x => Rating(x.user, x.product, if(x.rating >= 0) 1.0 else 0.0))
--- End diff --
`if(x.rating >= 0)` => `if (x.rating > 2.5)`. So ratings 3/4/5 are positive
and 1/2 are negative.
Does this line fit the one above?
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