Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/597#discussion_r12407485
--- Diff:
examples/src/main/scala/org/apache/spark/examples/mllib/MovieLensALS.scala ---
@@ -121,11 +157,23 @@ object MovieLensALS {
}
/** Compute RMSE (Root Mean Squared Error). */
- def computeRmse(model: MatrixFactorizationModel, data: RDD[Rating], n:
Long) = {
+ def computeRmse(model: MatrixFactorizationModel, data: RDD[Rating],
implicitPrefs: Boolean) = {
+
+ def mapPredictedRating(r: Double) =
+ if (!implicitPrefs) {
--- End diff --
Can we change it to the following:
~~~
if (implicitPrefs) math.max(math.min(r, 1.0), 0.0) else r
~~~
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