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From "Frens Jan Rumph (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-1241) Support sliding in RDD
Date Thu, 25 Sep 2014 20:46:34 GMT

    [ https://issues.apache.org/jira/browse/SPARK-1241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14148281#comment-14148281
] 

Frens Jan Rumph commented on SPARK-1241:
----------------------------------------

Hi,

I'm investigating use of Spark for matching patterns in symbolically represented time series
where the sliding functionality as available from scala iterators would make life a lot easier.

>From the ticket I'd say this functionality is implemented (status resolved, fix version
1.0.0, ...), but I can't find it in the docs and the PR indicates that this functionality
hasn't made it into Spark (just yet ...). Is this functionality available?

Cheers,
Frens

Background: I want to compare strings of segments to other (larger) strings of segments. As
segment strings may be split up over partitions, the more straight forward aproaches I could
come up with don't work.

> Support sliding in RDD
> ----------------------
>
>                 Key: SPARK-1241
>                 URL: https://issues.apache.org/jira/browse/SPARK-1241
>             Project: Spark
>          Issue Type: New Feature
>          Components: Spark Core
>            Reporter: Xiangrui Meng
>            Assignee: Xiangrui Meng
>             Fix For: 1.0.0
>
>
> Sliding is useful for operations like creating n-grams, calculating total variation,
numerical integration, etc.



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