Examples with ArrayOfDoublesUpdatableSketch com.yahoo.sketches.tuple.ArrayOfDoublesUpdatableSketch used on opensource projects

Example 21 with ArrayOfDoublesUpdatableSketch

use of com.yahoo.sketches.tuple.ArrayOfDoublesUpdatableSketch in project sketches-pig by DataSketches.

the class ArrayOfDoublesSketchesToPValueEstimatesTest method oneEmptySketch.

/**
 * Check input of single empty sketch.
 * @throws Exception
 */
@Test
public void oneEmptySketch() throws Exception {
    EvalFunc<Tuple> func = new ArrayOfDoublesSketchesToPValueEstimates();
    ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build();
    Tuple inputTuple = PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray()));
    Tuple resultTuple = func.exec(inputTuple);
    Assert.assertNull(resultTuple);
}

Example 22 with ArrayOfDoublesUpdatableSketch

use of com.yahoo.sketches.tuple.ArrayOfDoublesUpdatableSketch in project sketches-pig by DataSketches.

the class UnionArrayOfDoublesSketchTest method accumulator.

@Test
public void accumulator() throws Exception {
    Accumulator<Tuple> func = new UnionArrayOfDoublesSketch("4096", "1");
    DataBag bag = BagFactory.getInstance().newDefaultBag();
    {
        ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build();
        sketch.update(1, new double[] { 1.0 });
        sketch.update(2, new double[] { 1.0 });
        bag.add(PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())));
    }
    func.accumulate(PigUtil.objectsToTuple(bag));
    bag = BagFactory.getInstance().newDefaultBag();
    {
        ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build();
        sketch.update(1, new double[] { 1.0 });
        sketch.update(2, new double[] { 1.0 });
        bag.add(PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())));
    }
    func.accumulate(PigUtil.objectsToTuple(bag));
    Tuple resultTuple = func.getValue();
    Assert.assertNotNull(resultTuple);
    Assert.assertEquals(resultTuple.size(), 1);
    DataByteArray bytes = (DataByteArray) resultTuple.get(0);
    Assert.assertTrue(bytes.size() > 0);
    ArrayOfDoublesSketch sketch = ArrayOfDoublesSketches.heapifySketch(Memory.wrap(bytes.get()));
    Assert.assertEquals(sketch.getEstimate(), 2.0, 0.0);
    for (double[] values : sketch.getValues()) {
        Assert.assertEquals(values[0], 2.0, 0.0);
    }
}

Example 23 with ArrayOfDoublesUpdatableSketch

use of com.yahoo.sketches.tuple.ArrayOfDoublesUpdatableSketch in project sketches-pig by DataSketches.

the class UnionArrayOfDoublesSketchTest method algebraicIntemediateFinalEstimation.

@Test
public void algebraicIntemediateFinalEstimation() throws Exception {
    EvalFunc<Tuple> func = new UnionArrayOfDoublesSketch.IntermediateFinal("16384", "1");
    DataBag bag = BagFactory.getInstance().newDefaultBag();
    long value = 1;
    // this is to simulate the output from Initial
    {
        ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().setNominalEntries(16384).build();
        for (int i = 0; i < 20000; i++) sketch.update(value++, new double[] { 1.0 });
        DataBag innerBag = PigUtil.tuplesToBag(PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())));
        bag.add(PigUtil.objectsToTuple(innerBag));
    }
    // this is to simulate the output from a prior call of IntermediateFinal
    {
        ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().setNominalEntries(16384).build();
        for (int i = 0; i < 20000; i++) sketch.update(value++, new double[] { 1.0 });
        bag.add(PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())));
    }
    Tuple resultTuple = func.exec(PigUtil.objectsToTuple(bag));
    Assert.assertNotNull(resultTuple);
    Assert.assertEquals(resultTuple.size(), 1);
    DataByteArray bytes = (DataByteArray) resultTuple.get(0);
    Assert.assertTrue(bytes.size() > 0);
    ArrayOfDoublesSketch sketch = ArrayOfDoublesSketches.heapifySketch(Memory.wrap(bytes.get()));
    Assert.assertEquals(sketch.getEstimate(), 40000.0, 40000.0 * 0.01);
    for (double[] values : sketch.getValues()) {
        Assert.assertEquals(values[0], 1.0, 0.0);
    }
}

Example 24 with ArrayOfDoublesUpdatableSketch

use of com.yahoo.sketches.tuple.ArrayOfDoublesUpdatableSketch in project sketches-pig by DataSketches.

the class ArrayOfDoublesSketchToEstimateAndErrorBoundsTest method nonEmptyInputSketchExactMode.

@Test
public void nonEmptyInputSketchExactMode() throws Exception {
    EvalFunc<Tuple> func = new ArrayOfDoublesSketchToEstimateAndErrorBounds();
    ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build();
    sketch.update(1, new double[] { 0 });
    Tuple resultTuple = func.exec(tupleFactory.newTuple(new DataByteArray(sketch.compact().toByteArray())));
    Assert.assertNotNull(resultTuple);
    Assert.assertEquals(resultTuple.size(), 3);
    Assert.assertEquals(resultTuple.get(0), 1.0);
    Assert.assertEquals(resultTuple.get(1), 1.0);
    Assert.assertEquals(resultTuple.get(2), 1.0);
}

Example 25 with ArrayOfDoublesUpdatableSketch

use of com.yahoo.sketches.tuple.ArrayOfDoublesUpdatableSketch in project sketches-pig by DataSketches.

the class ArrayOfDoublesSketchToEstimateAndErrorBoundsTest method nonEmptyInputSketchEstimationMode.

@Test
public void nonEmptyInputSketchEstimationMode() throws Exception {
    EvalFunc<Tuple> func = new ArrayOfDoublesSketchToEstimateAndErrorBounds();
    ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build();
    // to saturate the sketch with default number of nominal entries (4K)
    int numKeys = 10000;
    for (int i = 0; i < numKeys; i++) {
        sketch.update(i, new double[] { 0 });
    }
    Tuple resultTuple = func.exec(tupleFactory.newTuple(new DataByteArray(sketch.compact().toByteArray())));
    Assert.assertNotNull(resultTuple);
    Assert.assertEquals(resultTuple.size(), 3);
    double estimate = (double) resultTuple.get(0);
    double lowerBound = (double) resultTuple.get(1);
    double upperBound = (double) resultTuple.get(2);
    Assert.assertEquals(estimate, numKeys, numKeys * 0.04);
    Assert.assertEquals(lowerBound, numKeys, numKeys * 0.04);
    Assert.assertEquals(upperBound, numKeys, numKeys * 0.04);
    Assert.assertTrue(lowerBound < estimate);
    Assert.assertTrue(upperBound > estimate);
}