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Posted to issues@hivemall.apache.org by "Aaron Wong (JIRA)" <ji...@apache.org> on 2019/04/29 07:40:00 UTC

[jira] [Commented] (HIVEMALL-253) UDF map_roulette() created

    [ https://issues.apache.org/jira/browse/HIVEMALL-253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16828995#comment-16828995 ] 

Aaron Wong commented on HIVEMALL-253:
-------------------------------------

[https://github.com/apache/incubator-hivemall/pull/192]

This is the pull request.

> UDF map_roulette() created
> --------------------------
>
>                 Key: HIVEMALL-253
>                 URL: https://issues.apache.org/jira/browse/HIVEMALL-253
>             Project: Hivemall
>          Issue Type: New Feature
>    Affects Versions: 0.6.0
>            Reporter: Aaron Wong
>            Priority: Major
>
> In data processing process, we usually encounter the problem that we have some selection and their probably(or weight), we should select one of them according to their probably(or weight).
> UDF map_roulette() is a implement of roulette. It can select a Key from a map according to key's weight  value.



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