[jira] [Commented] (TINKERPOP-2487) Add steps to support basic analysis like standard deviation and percentile

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TINKERPOP-2487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17279650#comment-17279650 ] 

ASF GitHub Bot commented on TINKERPOP-2487:
-------------------------------------------

spmallette commented on pull request #1375:
URL: https://github.com/apache/tinkerpop/pull/1375#issuecomment-773983784


   Hi @junshiguo - I was just wondering if you planned to return to this pull request? If not, I will plan to pick up where you left off. Thanks for your efforts so far.


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> Add steps to support basic analysis like standard deviation and percentile
> --------------------------------------------------------------------------
>
>                 Key: TINKERPOP-2487
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2487
>             Project: TinkerPop
>          Issue Type: Improvement
>          Components: process
>    Affects Versions: 3.4.8
>            Reporter: Guo Junshi
>            Priority: Minor
>
> When using tinkerpop Gremlin for real use cases, we found that some general analytical steps are very useful, yet not supported now. Some analytical steps are general enough to be part of the official gremlin package, e.g. steps to calculate standard deviation and percentile. The example usage might be:
>  
> {code:java}
> gremlin> g.V().values('ages')
> ==>1
> ==>2
> ==>3
> gremlin> g.V().values('ages').stdev()
> ==>0.816
> gremlin> g.V().values('ages').fold().stdev(Scope.local)
> ==>0.816
> gremlin> g.V().values('ages').percentile(50)
> ==>2
> // one percentile, return single value
> gremlin> g.V().values('ages').percentile(0, 100)
> ==>[0: 1, 100: 3]
> // multiple percentiles, return a map{code}
> These steps are frequently used in our cases, and we think it would be great to support them in official versions. 
>  
>  



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