Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/23072#discussion_r239700846
--- 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 --
Yea, we do have for indentation rule. "Code Style Guide" at
https://spark.apache.org/contributing.html ->
https://google.github.io/styleguide/Rguide.xml. I know the code style is not
perfectly documented but at least there are some examples. I think the correct
indentation is:
```r
df <- createDataFrame(list(list(0L, 1L, 1.0), list(0L, 2L, 1.0),
list(1L, 2L, 1.0), list(3L, 4L, 1.0),
list(4L, 0L, 0.1)),
schema = c("src", "dst", "weight"))
```
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