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Posted to jira@arrow.apache.org by "Dewey Dunnington (Jira)" <ji...@apache.org> on 2021/12/21 13:01:00 UTC

[jira] [Assigned] (ARROW-14209) [R] Allow multiple arguments to n_distinct()

     [ https://issues.apache.org/jira/browse/ARROW-14209?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dewey Dunnington reassigned ARROW-14209:
----------------------------------------

    Assignee: Dragoș Moldovan-Grünfeld

> [R] Allow multiple arguments to n_distinct()
> --------------------------------------------
>
>                 Key: ARROW-14209
>                 URL: https://issues.apache.org/jira/browse/ARROW-14209
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: R
>            Reporter: Ian Cook
>            Assignee: Dragoș Moldovan-Grünfeld
>            Priority: Major
>             Fix For: 7.0.0
>
>
> ARROW-13620 and ARROW-14036 added support for the {{n_distinct()}} function in the dplyr verb {{summarise()}} but only with a single argument. Add support for multiple arguments to {{n_distinct()}}. This should return the number of unique combinations of values in the specified columns/expressions.
> See the comment about this here: [https://github.com/apache/arrow/pull/11257#discussion_r720873549]



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