Github user shivaram commented on a diff in the pull request:
https://github.com/apache/spark/pull/8266#discussion_r37374083
--- Diff: R/pkg/R/functions.R ---
@@ -163,3 +163,17 @@ setMethod("n", signature(x = "Column"),
function(x) {
count(x)
})
+
+#' when
+#'
+#' Evaluates a list of conditions and returns one of multiple possible
result expressions.
--- End diff --
We can remove the part about `otherwise` here and just make this
```
Evaluates a list of conditions and returns one of multiple possible result
expressions. For unmatched expressions null is returned.
```
For the `otherwise` documentation we can say
```
If values in the specified column are null, returns the value. Can be used
in conjunction with `when` to specify a default value for expressions.
```
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