Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/21482#discussion_r192574664
--- Diff: R/pkg/R/functions.R ---
@@ -907,6 +907,30 @@ setMethod("initcap",
column(jc)
})
+#' @details
+#' \code{isinf}: Returns true if the column is Infinity.
+#' @rdname column_nonaggregate_functions
+#' @aliases isnan isnan,Column-method
+#' @note isinf since 2.4.0
+setMethod("isinf",
--- End diff --
For `isNaN` case, `functions.R` only defines `isnan`. `isNaN` is defined in
`column.R`. If we really want to have both `isInf` and `isinf` like `isNaN` and
`isnan`, maybe to follow it instead having two duplicate method definition here
is better.
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