Github user vasia commented on a diff in the pull request:
https://github.com/apache/flink/pull/537#discussion_r28643395
--- Diff: docs/gelly_guide.md ---
@@ -430,6 +440,46 @@ public static final class Messenger extends
MessagingFunction {...}
{% endhighlight %}
+The following example illustrates the usage of the degree, the number of
vertices as well as the messaging direction options.
+
+{% highlight java %}
+
+Graph<Long, Double, Double> graph = ...
+
+// configure the iteration
+IterationConfiguration parameters = new IterationConfiguration();
+
+// set the messaging direction
+parameters.setDirection(EdgeDirection.IN);
--- End diff --
This is not used anywhere in the example. I would remove it from here and
add another example only for the direction, together with the figures I mention
above.
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