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ASF GitHub Bot commented on TINKERPOP-2487: ------------------------------------------- junshiguo opened a new pull request #1372: URL: https://github.com/apache/tinkerpop/pull/1372 https://issues.apache.org/jira/browse/TINKERPOP-2487 Added two frequently used analytical steps for calculation of standard deviation and percentile value. The example usage is ``` 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 ``` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > 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. > > -- This message was sent by Atlassian Jira (v8.3.4#803005)