thisisnic commented on a change in pull request #10215:
URL: https://github.com/apache/arrow/pull/10215#discussion_r624008001
##########
File path: r/R/compute.R
##########
@@ -267,6 +267,25 @@ value_counts <- function(x) {
call_function("value_counts", x)
}
+
+#' `variance` and `stddev` for Arrow objects
+#'
+#' These functions calculate the variance and standard deviation of Arrow
arrays
+#' @param x `Array` or `ChunkedArray`
+#' @param ddof The divisor used in calculations is N - ddof, where N is the
number of elements.
+#' By default, ddof is zero, and population variance or stddev is returned.
+#' @return A `Scalar` containing the calculated value.
+#' @export
+stddev <- function(x, ddof = 0) {
+ call_function("stddev", x, options = list(ddof = ddof))
Review comment:
There is not. Done - https://issues.apache.org/jira/browse/ARROW-12615
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