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Posted to jira@arrow.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/12/15 07:07:00 UTC
[jira] [Updated] (ARROW-10831) [C++][Compute] Implemement quantile
kernel
[ https://issues.apache.org/jira/browse/ARROW-10831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated ARROW-10831:
-----------------------------------
Labels: pull-request-available (was: )
> [C++][Compute] Implemement quantile kernel
> ------------------------------------------
>
> Key: ARROW-10831
> URL: https://issues.apache.org/jira/browse/ARROW-10831
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Yibo Cai
> Assignee: Yibo Cai
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Similar function as [https://numpy.org/doc/stable/reference/generated/numpy.quantile.html]
> Support chunked array, and calculate multiple quantiles at once.
> Possibly implement features in steps:
> - implement exact quantile kernel which records all chunks and partition at finalize
> - reduce memory footprint for integer inputs by maintaining "value:count" histogram
> - implement approximate quantile kernel without storing input values
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