September 2015
Intermediate to advanced
148 pages
3h 20m
English
Content preview from Apache Spark Graph ProcessingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Community detection through label propagation
In the following section, we are going to implement a community detection algorithm using the Pregel interface. Label Propagation Algorithm (LPA) is a simple and fast method for detecting communities within graphs. By construction, the communities obtained by the label propagation process require each node to have at least as many neighbors within its community as it has with each of the other communities.
Let's quickly describe how the LPA works. First, each node is initially given its vertex ID as its label. At the subsequent iterations, each node determines its community, based on the labels of its neighbors. Specifically, the node chooses to join the community to which the maximum number of its ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.