Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/9218#discussion_r42801664
--- Diff: R/pkg/R/DataFrame.R ---
@@ -276,6 +276,57 @@ setMethod("names<-",
}
})
+#' @rdname columns
+#' @name colnames
+setMethod("colnames",
+ signature(x = "DataFrame"),
+ function(x) {
+ columns(x)
+ })
+
+#' @rdname columns
+#' @name colnames<-
+setMethod("colnames<-",
+ signature(x = "DataFrame", value = "character"),
+ function(x, value) {
+ sdf <- callJMethod(x@sdf, "toDF", as.list(value))
+ dataFrame(sdf)
+ })
+
+#' coltypes
+#'
+#' Set the column types of a DataFrame.
+#'
+#' @name coltypes
+#' @param x (DataFrame)
+#' @return value (character) A character vector with the target column
types for the given DataFrame
+#' @rdname coltypes
+#' @aliases coltypes
+#' @export
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' sqlContext <- sparkRSQL.init(sc)
+#' path <- "path/to/file.json"
+#' df <- jsonFile(sqlContext, path)
+#' coltypes(df) <- c("string", "integer")
+#'}
+setMethod("coltypes<-",
--- End diff --
Certainly, it is in PR 8984 by @olarayej
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
