Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/14384#discussion_r74527216
--- Diff: R/pkg/R/mllib.R ---
@@ -632,3 +642,159 @@ setMethod("predict", signature(object =
"AFTSurvivalRegressionModel"),
function(object, newData) {
return(dataFrame(callJMethod(object@jobj, "transform",
newData@sdf)))
})
+
+
+#' Alternating Least Squares (ALS) for Collaborative Filtering
+#'
+#' \code{spark.als} learns latent factors in collaborative filtering via
alternating least
+#' squares. Users can call \code{summary} to obtain fitted latent factors,
\code{predict}
+#' to make predictions on new data, and \code{write.ml}/\code{read.ml} to
save/load fitted models.
+#'
+#' For more details, see
+#'
\href{http://spark.apache.org/docs/latest/ml-collaborative-filtering.html}{MLlib:
+#' Collaborative Filtering}.
+#' Additional arguments can be passed to the methods.
+#' \describe{
+#' \item{nonnegative}{logical value indicating whether to apply
nonnegativity constraints.
+#' Default: FALSE}
+#' \item{implicitPrefs}{logical value indicating whether to use
implicit preference.
+#' Default: FALSE}
+#' \item{alpha}{alpha parameter in the implicit preference formulation
(>= 0). Default: 1.0}
+#' \item{seed}{integer seed for random number generation. Default: 0}
+#' \item{numUserBlocks}{number of user blocks used to parallelize
computation (> 0).
+#' Default: 10}
+#' \item{numItemBlocks}{number of item blocks used to parallelize
computation (> 0).
+#' Default: 10}
+#' \item{checkpointInterval}{number of checkpoint intervals (>= 1) or
disable checkpoint (-1).
+#' Default: 10}
+#' }
+#'
+#' @param data A SparkDataFrame for training
+#' @param ratingCol column name for ratings
+#' @param userCol column name for user ids. Ids must be (or can be coerced
into) integers
+#' @param itemCol column name for item ids. Ids must be (or can be coerced
into) integers
+#' @param rank rank of the matrix factorization (> 0)
+#' @param reg regularization parameter (>= 0)
+#' @param maxIter maximum number of iterations (>= 0)
--- End diff --
please add documentation for `...` as for example `@param ... additional
name arguments such as nonnegative`
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