Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/16264#discussion_r92257313
--- Diff: R/pkg/vignettes/sparkr-vignettes.Rmd ---
@@ -526,6 +530,34 @@ gaussianFitted <- predict(gaussianGLM, carsDF)
head(select(gaussianFitted, "model", "prediction", "mpg", "wt", "hp"))
```
+#### Random Forest
+
+`spark.randomForest` fits a [random
forest](https://en.wikipedia.org/wiki/Random_forest) classification or
regression model on a `SparkDataFrame`.
+Users can call `summary` to get a summary of the fitted model, `predict`
to make predictions, and `write.ml`/`read.ml` to save/load fitted models.
+
+In the following example, we use the `longley` dataset to train a random
forest and make predictions:
+
+```{r}
--- End diff --
updated
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