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https://issues.apache.org/jira/browse/FLINK-3919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15313955#comment-15313955
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Simone Robutti commented on FLINK-3919:
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Umh, probably you're right. I checked breeze and they use addition for matrix
addition and sum for element-wise sum.
> Distributed Linear Algebra: row-based matrix
> --------------------------------------------
>
> Key: FLINK-3919
> URL: https://issues.apache.org/jira/browse/FLINK-3919
> Project: Flink
> Issue Type: New Feature
> Components: Machine Learning Library
> Reporter: Simone Robutti
> Assignee: Simone Robutti
>
> Distributed matrix implementation as a DataSet of IndexedRow and related
> operations
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