Package org.apache.mahout.classifier.df.data

Examples of org.apache.mahout.classifier.df.data.Data

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    Data[] datas = generateTrainingDataA();
    // Build Forest
    DecisionForest forest = buildForest(datas);
    // Test data
    Dataset dataset = datas[0].getDataset();
    Data testData = DataLoader.loadData(dataset, TEST_DATA);

    double noValue = dataset.valueOf(4, "no");
    double yesValue = dataset.valueOf(4, "yes");
    assertEquals(noValue, forest.classify(testData.getDataset(), rng, testData.get(0)), EPSILON);
    // This one is tie-broken -- 1 is OK too
    //assertEquals(yesValue, forest.classify(testData.getDataset(), rng, testData.get(1)), EPSILON);
    assertEquals(noValue, forest.classify(testData.getDataset(), rng, testData.get(2)), EPSILON);
  }
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    for (int i = 0; i < data.size(); i++) {
      if (data.get(i).get(0) != 0.0d) {
        instances.add(data.get(i));
      }
    }
    Data lessData = new Data(data.getDataset(), instances);
   
    // build tree
    DecisionTreeBuilder builder = new DecisionTreeBuilder();
    builder.setM(data.getDataset().nbAttributes() - 1);
    builder.setMinSplitNum(0);
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    Data[] datas = generateTrainingDataA();
    // Build Forest
    DecisionForest forest = buildForest(datas);
    // Test data
    Dataset dataset = datas[0].getDataset();
    Data testData = DataLoader.loadData(dataset, TEST_DATA);

    double[][] predictions = new double[testData.size()][];
    forest.classify(testData, predictions);
    double noValue = dataset.valueOf(4, "no");
    double yesValue = dataset.valueOf(4, "yes");
    assertArrayEquals(new double[][]{{noValue, Double.NaN, Double.NaN},
        {noValue, yesValue, Double.NaN}, {noValue, noValue, Double.NaN}}, predictions);
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            "|   humidity >= 77.5 : no").equals(visualization));
  }
 
  @Test
  public void testEmpty() throws Exception {
    Data emptyData = new Data(data.getDataset());
   
    // build tree
    DecisionTreeBuilder builder = new DecisionTreeBuilder();
    Node tree = builder.build(rng, emptyData);
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Related Classes of org.apache.mahout.classifier.df.data.Data

  • org.apache.mahout.classifier.df.Bagging
  • org.apache.mahout.classifier.df.BreimanExample
  • org.apache.mahout.classifier.df.builder.DecisionTreeBuilder
  • org.apache.mahout.classifier.df.builder.DefaultTreeBuilder
  • org.apache.mahout.classifier.df.builder.InfiniteRecursionTest
  • org.apache.mahout.classifier.df.DecisionForestTest
  • org.apache.mahout.classifier.df.mapreduce.BuildForest
  • org.apache.mahout.classifier.df.mapreduce.inmem.InMemMapper
  • org.apache.mahout.classifier.df.mapreduce.partial.Step1Mapper
  • org.apache.mahout.classifier.df.split.DefaultIgSplit
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