Examples with HllSketch com.yahoo.sketches.hll.HllSketch used on opensource projects

Example 21 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project Gaffer by gchq.

the class HllpSketchJsonSerialisationTest method testValidHyperLogLogPlusSketchSerialisedCorrectly.

@Test
public void testValidHyperLogLogPlusSketchSerialisedCorrectly() throws IOException {
    // Given
    final String testString = "TestString";
    final HllSketch sketch = new HllSketch(10);
    sketch.update(testString);
    // When / Then
    runTestWithSketch(sketch);
}

Example 22 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project Gaffer by gchq.

the class HllpSketchJsonSerialisationTest method testEmptyHyperLogLogPlusSketchIsSerialised.

@Test
public void testEmptyHyperLogLogPlusSketchIsSerialised() throws IOException {
    // Given
    final HllSketch sketch = new HllSketch(10);
    // When / Then
    runTestWithSketch(sketch);
}

Example 23 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project Gaffer by gchq.

the class IterableToHllSketchTest method shouldCreateHllSketch.

@Test
public void shouldCreateHllSketch() {
    // Given
    IterableToHllSketch iterableToHllSketch = new IterableToHllSketch();
    List<Object> input = Arrays.asList("one", "two", "three", "four", "five");
    // When
    HllSketch result = iterableToHllSketch.apply(input);
    // Then
    assertThat(result.getEstimate()).isCloseTo(5, Percentage.withPercentage(0.001));
}

Example 24 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project Gaffer by gchq.

the class IterableToHllSketchTest method shouldCreateHllSketchCardinality.

@Test
public void shouldCreateHllSketchCardinality() {
    // Given
    IterableToHllSketch iterableToHllSketch = new IterableToHllSketch();
    List<Object> input = Arrays.asList("one", "one", "two", "two", "three");
    // When
    HllSketch result = iterableToHllSketch.apply(input);
    // Then
    assertThat(result.getEstimate()).isCloseTo(3, Percentage.withPercentage(0.001));
}

Example 25 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project Gaffer by gchq.

the class HllSketchIsLessThanTest method setup.

@BeforeAll
public static void setup() {
    hllSketchWithCardinality5 = new HllSketch(10);
    for (int i = 1; i <= 5; i++) {
        hllSketchWithCardinality5.update(i);
    }
    assertEquals(5d, hllSketchWithCardinality5.getEstimate(), DELTA);
    hllSketchWithCardinality18 = new HllSketch(10);
    for (int i = 1; i <= 18; i++) {
        hllSketchWithCardinality18.update(i);
    }
    assertEquals(18d, hllSketchWithCardinality18.getEstimate(), DELTA);
    hllSketchWithCardinality32 = new HllSketch(10);
    for (int i = 1; i <= 32; i++) {
        hllSketchWithCardinality32.update(i);
    }
    assertEquals(32d, hllSketchWithCardinality32.getEstimate(), DELTA);
}