Package org.apache.spark.api.java

Examples of org.apache.spark.api.java.JavaDoubleRDD.histogram()

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  @Test
  public void javaDoubleRDDHistoGram() {
    JavaDoubleRDD rdd = sc.parallelizeDoubles(Arrays.asList(1.0, 2.0, 3.0, 4.0));
    // Test using generated buckets
    Tuple2<double[], long[]> results = rdd.histogram(2);
    double[] expected_buckets = {1.0, 2.5, 4.0};
    long[] expected_counts = {2, 2};
    Assert.assertArrayEquals(expected_buckets, results._1, 0.1);
    Assert.assertArrayEquals(expected_counts, results._2);
    // Test with provided buckets
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    double[] expected_buckets = {1.0, 2.5, 4.0};
    long[] expected_counts = {2, 2};
    Assert.assertArrayEquals(expected_buckets, results._1, 0.1);
    Assert.assertArrayEquals(expected_counts, results._2);
    // Test with provided buckets
    long[] histogram = rdd.histogram(expected_buckets);
    Assert.assertArrayEquals(expected_counts, histogram);
  }

  @Test
  public void map() {
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