[jira] [Assigned] (SYSTEMML-816) Extended CLA Aggregate Operation Support

["Matthias Boehm (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SYSTEMML-816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias Boehm reassigned SYSTEMML-816:
---------------------------------------

    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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