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Posted to jira@arrow.apache.org by "Joris Van den Bossche (Jira)" <ji...@apache.org> on 2021/05/03 11:39:00 UTC

[jira] [Commented] (ARROW-12615) [C++] Add options for handling NAs to stddev and variance

    [ https://issues.apache.org/jira/browse/ARROW-12615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17338326#comment-17338326 ] 

Joris Van den Bossche commented on ARROW-12615:
-----------------------------------------------

Yes, we are adding the option to skip nulls or not to several of the reduction kernels (default is to skip nulls, as is the current behaviour, and when not skipping nulls, any null in the input gives null as result). So it makes sense to add this to stddev/variance as well.

> [C++] Add options for handling NAs to stddev and variance
> ---------------------------------------------------------
>
>                 Key: ARROW-12615
>                 URL: https://issues.apache.org/jira/browse/ARROW-12615
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Nic Crane
>            Priority: Major
>
> Currently the compute kernels `stddev `and `variance` automatically ignore NAs, but it would be useful if there was an option to toggle this behaviour



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