[ https://issues.apache.org/jira/browse/SPARK-10641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiangrui Meng updated SPARK-10641: ---------------------------------- Attachment: simpler-moments.pdf I did some calculation offline and got a simpler formula for updating high-order moments. [~sethah] If you are interested, you can implement ImperativeAggregate using this formula. > skewness and kurtosis support > ----------------------------- > > Key: SPARK-10641 > URL: https://issues.apache.org/jira/browse/SPARK-10641 > Project: Spark > Issue Type: Sub-task > Components: ML, SQL > Reporter: Jihong MA > Assignee: Seth Hendrickson > Attachments: simpler-moments.pdf > > > Implementing skewness and kurtosis support based on following algorithm: > https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Higher-order_statistics -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org