Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/14229#discussion_r74676054
--- Diff: R/pkg/R/mllib.R ---
@@ -299,6 +307,92 @@ setMethod("summary", signature(object =
"NaiveBayesModel"),
return(list(apriori = apriori, tables = tables))
})
+# Returns posterior probabilities from a Latent Dirichlet Allocation model
produced by spark.lda()
+
+#' @param newData A SparkDataFrame for testing
+#' @return \code{spark.posterior} returns a SparkDataFrame containing
posterior probabilities
+#' vectors named "topicDistribution"
+#' @rdname spark.lda
+#' @aliases spark.lda,spark.posterior,LDAModel-method,SparkDataFrame
+#' @export
+#' @note spark.posterior(LDAModel) since 2.1.0
+setMethod("spark.posterior", signature(object = "LDAModel", newData =
"SparkDataFrame"),
+ function(object, newData) {
+ return(dataFrame(callJMethod(object@jobj, "transform",
newData@sdf)))
+ })
+
+# Returns the summary of a Latent Dirichlet Allocation model produced by
\code{spark.lda}
+
+#' @param object A Latent Dirichlet Allocation model fitted by
\code{spark.lda}
+#' @return \code{summary} returns a list containing
+#' \code{docConcentration}, concentration parameter commonly named
\code{alpha} for the
--- End diff --
roxygen trims whitespaces - a list like this will be hard to read in
generated doc. try \item or \cr to format them
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