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

Example 6 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class DataToSketchTest method execNullInputTuple.

@Test
public void execNullInputTuple() throws Exception {
    EvalFunc<DataByteArray> func = new DataToSketch();
    DataByteArray result = func.exec(null);
    HllSketch sketch = getSketch(result);
    Assert.assertTrue(sketch.isEmpty());
}

Example 7 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class DataToSketchTest method algebraicFinalFromIntermediate.

@Test
public void algebraicFinalFromIntermediate() throws Exception {
    @SuppressWarnings("unchecked") EvalFunc<DataByteArray> func = (EvalFunc<DataByteArray>) Class.forName(new DataToSketch().getFinal()).newInstance();
    HllSketch inputSketch = new HllSketch(12);
    inputSketch.update("a");
    inputSketch.update("b");
    DataBag bag = bagFactory.newDefaultBag();
    bag.add(tupleFactory.newTuple(new DataByteArray(inputSketch.toCompactByteArray())));
    DataByteArray result = func.exec(tupleFactory.newTuple(bag));
    HllSketch sketch = getSketch(result);
    Assert.assertFalse(sketch.isEmpty());
    Assert.assertEquals(sketch.getEstimate(), 2.0, 0.01);
}

Example 8 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class DataToSketchTest method algebraicIntermediateEmptyBag.

@Test
public void algebraicIntermediateEmptyBag() throws Exception {
    @SuppressWarnings("unchecked") EvalFunc<Tuple> func = (EvalFunc<Tuple>) Class.forName(new DataToSketch().getIntermed()).getConstructor(String.class, String.class).newInstance("10", "HLL_6");
    Tuple result = func.exec(tupleFactory.newTuple(bagFactory.newDefaultBag()));
    HllSketch sketch = getSketch((DataByteArray) result.get(0));
    Assert.assertTrue(sketch.isEmpty());
    Assert.assertEquals(sketch.getLgConfigK(), 10);
    Assert.assertEquals(sketch.getTgtHllType(), TgtHllType.HLL_6);
}

Example 9 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class UnionSketchTest method algebraicIntermediateFromIntermediate.

@Test
public void algebraicIntermediateFromIntermediate() throws Exception {
    @SuppressWarnings("unchecked") EvalFunc<Tuple> func = (EvalFunc<Tuple>) Class.forName(new UnionSketch().getIntermed()).newInstance();
    HllSketch inputSketch = new HllSketch(12);
    inputSketch.update("a");
    inputSketch.update("b");
    DataBag bag = bagFactory.newDefaultBag();
    bag.add(tupleFactory.newTuple(new DataByteArray(inputSketch.toCompactByteArray())));
    Tuple result = func.exec(tupleFactory.newTuple(bag));
    HllSketch sketch = DataToSketchTest.getSketch((DataByteArray) result.get(0));
    Assert.assertFalse(sketch.isEmpty());
    Assert.assertEquals(sketch.getEstimate(), 2.0, 0.01);
}

Example 10 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class UnionSketchTest method algebraicIntermediateEmptyInputTuple.

@Test
public void algebraicIntermediateEmptyInputTuple() throws Exception {
    @SuppressWarnings("unchecked") EvalFunc<Tuple> func = (EvalFunc<Tuple>) Class.forName(new UnionSketch().getIntermed()).getConstructor(String.class).newInstance("10");
    Tuple result = func.exec(tupleFactory.newTuple());
    HllSketch sketch = DataToSketchTest.getSketch((DataByteArray) result.get(0));
    Assert.assertTrue(sketch.isEmpty());
    Assert.assertEquals(sketch.getLgConfigK(), 10);
}