Github user sun-rui commented on a diff in the pull request:
https://github.com/apache/spark/pull/9680#discussion_r45167221
--- Diff: R/pkg/R/functions.R ---
@@ -259,6 +259,20 @@ setMethod("column",
function(x) {
col(x)
})
+#' corr
+#'
+#' Computes the Pearson Correlation Coefficient for two Columns.
+#'
+#' @rdname corr
+#' @name corr
+#' @family math_funcs
+#' @export
+#' @examples \dontrun{corr(df$c, df$d)}
+setMethod("corr", signature(x = "Column", col1 = "Column", col2 =
"missing", method = "missing"),
--- End diff --
#9366 only supports inter-column cov and cor of a DataFrame, not between
columns of two DataFrames. I think actually it is better to add alias in this
PR. corr() operating on two columns is similar to R cor() on two vectors.
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