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https://issues.apache.org/jira/browse/MAHOUT-1464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14031138#comment-14031138
]
ASF GitHub Bot commented on MAHOUT-1464:
----------------------------------------
Github user dlyubimov commented on a diff in the pull request:
https://github.com/apache/mahout/pull/18#discussion_r13770924
--- Diff:
math-scala/src/test/scala/org/apache/mahout/math/scalabindings/MatrixOpsSuite.scala
---
@@ -123,4 +123,16 @@ class MatrixOpsSuite extends FunSuite with MahoutSuite
{
}
+ test("numNonZeroElementsPerColumn") {
+ val a = dense(
+ (2, 3, 4),
+ (3, 4, 5),
+ (-5, 0, -1),
+ (0, 0, 1)
+ )
+
+ a.numNonZeroElementsPerColumn() should equal(dvec(3,2,4))
--- End diff --
style: spacing?
> Cooccurrence Analysis on Spark
> ------------------------------
>
> Key: MAHOUT-1464
> URL: https://issues.apache.org/jira/browse/MAHOUT-1464
> Project: Mahout
> Issue Type: Improvement
> Components: Collaborative Filtering
> Environment: hadoop, spark
> Reporter: Pat Ferrel
> Assignee: Pat Ferrel
> Fix For: 1.0
>
> Attachments: MAHOUT-1464.patch, MAHOUT-1464.patch, MAHOUT-1464.patch,
> MAHOUT-1464.patch, MAHOUT-1464.patch, MAHOUT-1464.patch, run-spark-xrsj.sh
>
>
> Create a version of Cooccurrence Analysis (RowSimilarityJob with LLR) that
> runs on Spark. This should be compatible with Mahout Spark DRM DSL so a DRM
> can be used as input.
> Ideally this would extend to cover MAHOUT-1422. This cross-cooccurrence has
> several applications including cross-action recommendations.
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