You totally can. https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala#L792
There is also an attempt at adding stddev here already: https://github.com/apache/spark/pull/5228 On Thu, Mar 26, 2015 at 12:37 AM, Haopu Wang <hw...@qilinsoft.com> wrote: > Specifically there are only 5 aggregate functions in class > org.apache.spark.sql.GroupedData: sum/max/min/mean/count. > > Can I plugin a function to calculate stddev? > > Thank you! > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@spark.apache.org > For additional commands, e-mail: user-h...@spark.apache.org > >
