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author | Ankur Dave <ankurdave@gmail.com> | 2014-05-29 15:39:25 -0700 |
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committer | Ankur Dave <ankurdave@gmail.com> | 2014-05-29 15:39:25 -0700 |
commit | b7e28fa451511b3b0f849c3d2919ac9c2e4231a1 (patch) | |
tree | cc3ad7afb12401eb052c9576368c39880d8ae34a /graphx/src/test | |
parent | 8f7141fbc015addb314e1d5801085587b5cbb171 (diff) | |
download | spark-b7e28fa451511b3b0f849c3d2919ac9c2e4231a1.tar.gz spark-b7e28fa451511b3b0f849c3d2919ac9c2e4231a1.tar.bz2 spark-b7e28fa451511b3b0f849c3d2919ac9c2e4231a1.zip |
initial version of LPA
A straightforward implementation of LPA algorithm for detecting graph communities using the Pregel framework. Amongst the growing literature on community detection algorithms in networks, LPA is perhaps the most elementary, and despite its flaws it remains a nice and simple approach.
Author: Ankur Dave <ankurdave@gmail.com>
Author: haroldsultan <haroldsultan@gmail.com>
Author: Harold Sultan <haroldsultan@gmail.com>
Closes #905 from haroldsultan/master and squashes the following commits:
327aee0 [haroldsultan] Merge pull request #2 from ankurdave/label-propagation
227a4d0 [Ankur Dave] Untabify
0ac574c [haroldsultan] Merge pull request #1 from ankurdave/label-propagation
0e24303 [Ankur Dave] Add LabelPropagationSuite
84aa061 [Ankur Dave] LabelPropagation: Fix compile errors and style; rename from LPA
9830342 [Harold Sultan] initial version of LPA
Diffstat (limited to 'graphx/src/test')
-rw-r--r-- | graphx/src/test/scala/org/apache/spark/graphx/lib/LabelPropagationSuite.scala | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/graphx/src/test/scala/org/apache/spark/graphx/lib/LabelPropagationSuite.scala b/graphx/src/test/scala/org/apache/spark/graphx/lib/LabelPropagationSuite.scala new file mode 100644 index 0000000000..61fd0c4605 --- /dev/null +++ b/graphx/src/test/scala/org/apache/spark/graphx/lib/LabelPropagationSuite.scala @@ -0,0 +1,45 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.spark.graphx.lib + +import org.scalatest.FunSuite + +import org.apache.spark.graphx._ + +class LabelPropagationSuite extends FunSuite with LocalSparkContext { + test("Label Propagation") { + withSpark { sc => + // Construct a graph with two cliques connected by a single edge + val n = 5 + val clique1 = for (u <- 0L until n; v <- 0L until n) yield Edge(u, v, 1) + val clique2 = for (u <- 0L to n; v <- 0L to n) yield Edge(u + n, v + n, 1) + val twoCliques = sc.parallelize(clique1 ++ clique2 :+ Edge(0L, n, 1)) + val graph = Graph.fromEdges(twoCliques, 1) + // Run label propagation + val labels = LabelPropagation.run(graph, n * 4).cache() + + // All vertices within a clique should have the same label + val clique1Labels = labels.vertices.filter(_._1 < n).map(_._2).collect.toArray + assert(clique1Labels.forall(_ == clique1Labels(0))) + val clique2Labels = labels.vertices.filter(_._1 >= n).map(_._2).collect.toArray + assert(clique2Labels.forall(_ == clique2Labels(0))) + // The two cliques should have different labels + assert(clique1Labels(0) != clique2Labels(0)) + } + } +} |