Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/18025#discussion_r122631306
--- Diff: R/pkg/R/stats.R ---
@@ -52,22 +52,17 @@ setMethod("crosstab",
collect(dataFrame(sct))
})
-#' Calculate the sample covariance of two numerical columns of a
SparkDataFrame.
--- End diff --
I see. in that case can we add this in the `@details` for `cov`
I feel like this has bits of info that could be useful `Calculate the
sample covariance of two numerical columns of a SparkDataFrame` - say,
*numerical* columns of *one* SparkDataFrame, as supposed to `cov(df, df$name,
df2$bar)`
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