Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/1407#discussion_r14925960
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/clustering/LocalKMeans.scala ---
@@ -59,6 +59,11 @@ private[mllib] object LocalKMeans extends Logging {
cumulativeScore += weights(j) * KMeans.pointCost(curCenters,
points(j))
j += 1
}
+ if (j == 0) {
+ logWarning("kMeansPlusPlus initialization ran out of distinct
points for centers." +
+ s" Using duplicate point for center k = $i.")
+ j = 1
--- End diff --
The code may be clearer if written in this way
~~~
centers(i) =
if (j == 0) {
logWarning("...")
points(0).toDense
} else {
points(j - 1).toDense
}
~~~
or
~~~
if (j == 0) {
logWarning("...")
centers(i) = points(0).toDense
} else {
centers(i) = points(j - 1).toDense
}
~~~
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