July 2017
Intermediate to advanced
796 pages
18h 55m
English
Content preview from Scala and Spark for Big Data Analytics
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ConnectedComponents
Connected components are essentially subgraphs within a graph, where the vertices are connected to each other in some way. This means that every vertex in the same component has an edge to/from some other vertex in the component. Whenever no other edge exists to connect a vertex to a component, a new component is created with that specific vertex. This continues until all vertices are in some component.
The graph object provides a connectComponents() function to compute the connected components. This uses the Pregel API underneath to calculate the component a vertex belongs to. The following is the code to calculate connected components in the graph. Obviously, in this example, we had only one connected component, so it ...
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