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https://issues.apache.org/jira/browse/SYSTEMML-816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Boehm reassigned SYSTEMML-816:
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Assignee: Matthias Boehm (was: Arvind Surve)
> Extended CLA Aggregate Operation Support
> ----------------------------------------
>
> Key: SYSTEMML-816
> URL: https://issues.apache.org/jira/browse/SYSTEMML-816
> Project: SystemML
> Issue Type: Task
> Reporter: Matthias Boehm
> Assignee: Matthias Boehm
>
> This task aims to introduce additional aggregate operations (unary
> aggregates, grouped aggregates) over compressed matrix blocks:
> 1) max/min, colMaxs/colMins (evaluated purely on value tuples, no need to
> access compressed bitmaps)
> 2) rowMaxs/rowMins (cache-conscious access to compressed bitmaps)
> 3) mean/var, colMeans/colVars (evaluated on value tuples and segment
> headers/run lengths)
> 4) rowMeans/rowVars (cache-conscious access to compressed bitmaps)
> 5) rowIndexMax, rowIndexMin (cache-conscious access to compressed bitmaps)
> 6) TODO
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