Github user huaxingao commented on a diff in the pull request:
https://github.com/apache/spark/pull/23072#discussion_r239250376
--- Diff: docs/ml-clustering.md ---
@@ -265,3 +265,44 @@ Refer to the [R API
docs](api/R/spark.gaussianMixture.html) for more details.
</div>
</div>
+
+## Power Iteration Clustering (PIC)
+
+Power Iteration Clustering (PIC) is a scalable graph clustering algorithm
+developed by <a
href=http://www.cs.cmu.edu/~frank/papers/icml2010-pic-final.pdf>Lin and
Cohen</a>.
--- End diff --
I normally check the md file on the github. The link works OK. Is there a
better way to check? @dongjoon-hyun @felixcheung
https://github.com/apache/spark/blob/9158da8cb76cc13f3011deaa7ac2c290eef62389/docs/ml-clustering.md
I guess I will still remove the ```a href=``` since no other places in the
doc uses ```<a>```
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