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https://issues.apache.org/jira/browse/MAHOUT-1971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15980084#comment-15980084
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ASF GitHub Bot commented on MAHOUT-1971:
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Github user asfgit closed the pull request at:
https://github.com/apache/mahout/pull/307
> Aggregate Transpose Bug
> -----------------------
>
> Key: MAHOUT-1971
> URL: https://issues.apache.org/jira/browse/MAHOUT-1971
> Project: Mahout
> Issue Type: Bug
> Reporter: Trevor Grant
> Assignee: Trevor Grant
> Fix For: 0.13.1
>
>
> In the At operation of Flink and spark there is a line that looks like:
> case (row, blockRow) => colV(row) = blockA(blockRow, blockCol)
> that ought to be
> case (row, blockRow) => colV(row) += blockA(blockRow, blockCol)
> Since it isnt'- the 'aggregate transpose' does not operate as expected.
> This needs to be updated in the Spark and Flink bindings (same one char fix).
> Test coverage should be updated to catch this.
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