Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/23072#discussion_r239701916
--- Diff: R/pkg/vignettes/sparkr-vignettes.Rmd ---
@@ -968,6 +970,17 @@ predicted <- predict(model, df)
head(predicted)
```
+#### Power Iteration Clustering
+
+Power Iteration Clustering (PIC) is a scalable graph clustering algorithm.
`spark.assignClusters` method runs the PIC algorithm and returns a cluster
assignment for each input vertex.
+
+```{r}
+df <- createDataFrame(list(list(0L, 1L, 1.0), list(0L, 2L, 1.0),
+ list(1L, 2L, 1.0), list(3L, 4L, 1.0),
--- End diff --
BTW, when I added that into https://spark.apache.org/contributing.html, we
also agreed upon following committer's judgement based upon the guide because
the guide mentions:
> The coding conventions described above should be followed, unless there
is good reason to do otherwise. Exceptions include legacy code and modifying
third-party code.
since we do have legacy reason, and there is a good reason - consistency
and committer's judgement.
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