Package org.apache.mahout.clustering.evaluation

Examples of org.apache.mahout.clustering.evaluation.ClusterEvaluator

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    CanopyDriver.run(conf, testdata, output, measure, 3.1, 1.1, true, true);
    int numIterations = 10;
    Path clustersIn = new Path(output, "clusters-0-final");
    RepresentativePointsDriver.run(conf, clustersIn, new Path(output,
        "clusteredPoints"), output, measure, numIterations, true);
    ClusterEvaluator evaluator = new ClusterEvaluator(conf, clustersIn);
    // now print out the Results
    System.out.println("Intra-cluster density = "
        + evaluator.intraClusterDensity());
    System.out.println("Inter-cluster density = "
        + evaluator.interClusterDensity());
   
    printRepPoints(numIterations);
  }
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        0.001, 10, true, true);
    int numIterations = 10;
    Path clustersIn = new Path(output, "clusters-2");
    RepresentativePointsDriver.run(conf, clustersIn, new Path(output,
        "clusteredPoints"), output, measure, numIterations, true);
    ClusterEvaluator evaluator = new ClusterEvaluator(conf, clustersIn);
    // now print out the Results
    System.out.println("Intra-cluster density = "
        + evaluator.intraClusterDensity());
    System.out.println("Inter-cluster density = "
        + evaluator.interClusterDensity());
    printRepPoints(numIterations);
  }
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        measure, 0.001, 10, 2, true, true, 0, true);
    int numIterations = 10;
    Path clustersIn = new Path(output, "clusters-4");
    RepresentativePointsDriver.run(conf, clustersIn, new Path(output,
        "clusteredPoints"), output, measure, numIterations, true);
    ClusterEvaluator evaluator = new ClusterEvaluator(conf, clustersIn);
    // now print out the Results
    System.out.println("Intra-cluster density = "
        + evaluator.intraClusterDensity());
    System.out.println("Inter-cluster density = "
        + evaluator.interClusterDensity());
    printRepPoints(numIterations);
  }
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        2.1, 1.0, 0.001, 10, false, true, true);
    int numIterations = 10;
    Path clustersIn = new Path(output, "clusters-7-final");
    RepresentativePointsDriver.run(conf, clustersIn, new Path(output,
        "clusteredPoints"), output, measure, numIterations, true);
    ClusterEvaluator evaluator = new ClusterEvaluator(conf, clustersIn);
    // now print out the Results
    System.out.println("Intra-cluster density = "
        + evaluator.intraClusterDensity());
    System.out.println("Inter-cluster density = "
        + evaluator.interClusterDensity());
    printRepPoints(numIterations);
  }
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    Configuration conf = new Configuration();
    Path clustersIn = new Path(output, "clusters-5-final");
    RepresentativePointsDriver.run(conf, clustersIn, new Path(output,
        "clusteredPoints"), output, new EuclideanDistanceMeasure(),
        numIterations, true);
    ClusterEvaluator evaluator = new ClusterEvaluator(conf, clustersIn);
    // now print out the Results
    System.out.println("Intra-cluster density = "
        + evaluator.intraClusterDensity());
    System.out.println("Inter-cluster density = "
        + evaluator.interClusterDensity());
    printRepPoints(numIterations);
  }
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          "--distanceMeasure", measure.getClass().getName(),
          "--maxIter", String.valueOf(numIters)
        });
        conf.set(RepresentativePointsDriver.DISTANCE_MEASURE_KEY, measure.getClass().getName());
        conf.set(RepresentativePointsDriver.STATE_IN_KEY, "tmp/representative/representativePoints-" + numIters);
        ClusterEvaluator ce = new ClusterEvaluator(conf, seqFileDir);
        writer.append("\n");
        writer.append("Inter-Cluster Density: ").append(String.valueOf(ce.interClusterDensity())).append("\n");
        writer.append("Intra-Cluster Density: ").append(String.valueOf(ce.intraClusterDensity())).append("\n");
        CDbwEvaluator cdbw = new CDbwEvaluator(conf, seqFileDir);
        writer.append("CDbw Inter-Cluster Density: ").append(String.valueOf(cdbw.interClusterDensity())).append("\n");
        writer.append("CDbw Intra-Cluster Density: ").append(String.valueOf(cdbw.intraClusterDensity())).append("\n");
        writer.append("CDbw Separation: ").append(String.valueOf(cdbw.separation())).append("\n");
        writer.flush();
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    int numIterations = 2;
    Path clustersIn = new Path(output, "clusters-0-final");
    RepresentativePointsDriver.run(conf, clustersIn, new Path(output, "clusteredPoints"), output, measure,
        numIterations, false);
    printRepPoints(numIterations);
    ClusterEvaluator evaluatorMR = new ClusterEvaluator(conf, clustersIn);
    // now run again using sequential reference point calculation
    HadoopUtil.delete(conf, output);
    CanopyDriver.run(conf, testdata, output, measure, 3.1, 1.1, true, 0.0, true);
    RepresentativePointsDriver.run(conf, clustersIn, new Path(output, "clusteredPoints"), output, measure,
        numIterations, true);
    printRepPoints(numIterations);
    ClusterEvaluator evaluatorSeq = new ClusterEvaluator(conf, clustersIn);
    // compare results
    assertEquals("InterCluster Density", evaluatorMR.interClusterDensity(), evaluatorSeq.interClusterDensity(), EPSILON);
    assertEquals("IntraCluster Density", evaluatorMR.intraClusterDensity(), evaluatorSeq.intraClusterDensity(), EPSILON);
  }
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  @Test
  public void testCluster0() throws IOException {
    ClusteringTestUtils.writePointsToFile(referenceData, new Path(testdata, "file1"), fs, conf);
    DistanceMeasure measure = new EuclideanDistanceMeasure();
    initData(1, 0.25, measure);
    ClusterEvaluator evaluator = new ClusterEvaluator(representativePoints, clusters, measure);
    assertEquals("inter cluster density", 0.33333333333333315, evaluator.interClusterDensity(), EPSILON);
    assertEquals("intra cluster density", 0.3656854249492381, evaluator.intraClusterDensity(), EPSILON);
  }
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  @Test
  public void testCluster1() throws IOException {
    ClusteringTestUtils.writePointsToFile(referenceData, new Path(testdata, "file1"), fs, conf);
    DistanceMeasure measure = new EuclideanDistanceMeasure();
    initData(1, 0.5, measure);
    ClusterEvaluator evaluator = new ClusterEvaluator(representativePoints, clusters, measure);
    assertEquals("inter cluster density", 0.33333333333333315, evaluator.interClusterDensity(), EPSILON);
    assertEquals("intra cluster density", 0.3656854249492381, evaluator.intraClusterDensity(), EPSILON);
  }
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  @Test
  public void testCluster2() throws IOException {
    ClusteringTestUtils.writePointsToFile(referenceData, new Path(testdata, "file1"), fs, conf);
    DistanceMeasure measure = new EuclideanDistanceMeasure();
    initData(1, 0.75, measure);
    ClusterEvaluator evaluator = new ClusterEvaluator(representativePoints, clusters, measure);
    assertEquals("inter cluster density", 0.33333333333333315, evaluator.interClusterDensity(), EPSILON);
    assertEquals("intra cluster density", 0.3656854249492381, evaluator.intraClusterDensity(), EPSILON);
  }
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Related Classes of org.apache.mahout.clustering.evaluation.ClusterEvaluator

  • org.apache.hadoop.fs.FileSystem
  • org.apache.hadoop.fs.Path
  • org.apache.hadoop.io.Writable
  • org.apache.mahout.clustering.Cluster
  • org.apache.mahout.clustering.TestClusterEvaluator
  • org.apache.mahout.math.RandomAccessSparseVector
  • org.apache.mahout.math.Vector
  • org.apache.mahout.utils.clustering.ClusterDumper
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