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

Example 11 with ArrayOfDoublesUpdatableSketch

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

the class UnionArrayOfDoublesSketchTest method algebraicIntemediateFinalExact.

@Test
public void algebraicIntemediateFinalExact() throws Exception {
    EvalFunc<Tuple> func = new UnionArrayOfDoublesSketch.IntermediateFinal("1");
    DataBag bag = BagFactory.getInstance().newDefaultBag();
    // this is to simulate the output from Initial
    {
        ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build();
        sketch.update(1, new double[] { 1.0 });
        sketch.update(2, 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().build();
        sketch.update(1, new double[] { 1.0 });
        sketch.update(2, 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(), 2.0, 0.0);
    for (double[] values : sketch.getValues()) {
        Assert.assertEquals(values[0], 2.0, 0.0);
    }
}

Example 12 with ArrayOfDoublesUpdatableSketch

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

the class ArrayOfDoublesSketchToEstimateAndErrorBoundsTest method emptyInputSketch.

@Test
public void emptyInputSketch() throws Exception {
    EvalFunc<Tuple> func = new ArrayOfDoublesSketchToEstimateAndErrorBounds();
    ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build();
    Tuple resultTuple = func.exec(tupleFactory.newTuple(new DataByteArray(sketch.compact().toByteArray())));
    Assert.assertNotNull(resultTuple);
    Assert.assertEquals(resultTuple.size(), 3);
    Assert.assertEquals(resultTuple.get(0), 0.0);
    Assert.assertEquals(resultTuple.get(1), 0.0);
    Assert.assertEquals(resultTuple.get(2), 0.0);
}

Example 13 with ArrayOfDoublesUpdatableSketch

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

the class ArrayOfDoublesSketchToEstimatesTest method emptySketch.

@Test
public void emptySketch() throws Exception {
    EvalFunc<Tuple> func = new ArrayOfDoublesSketchToEstimates();
    ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build();
    Tuple inputTuple = PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray()));
    Tuple resultTuple = func.exec(inputTuple);
    Assert.assertNotNull(resultTuple);
    Assert.assertEquals(resultTuple.size(), 2);
    Assert.assertEquals(resultTuple.get(0), 0.0);
    Assert.assertEquals(resultTuple.get(1), 0.0);
}

Example 14 with ArrayOfDoublesUpdatableSketch

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

the class ArrayOfDoublesSketchToMeansTest method oneEntryInputSketch.

@Test
public void oneEntryInputSketch() throws Exception {
    EvalFunc<Tuple> func = new ArrayOfDoublesSketchToMeans();
    ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build();
    sketch.update(1, new double[] { 1 });
    Tuple inputTuple = PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray()));
    Tuple resultTuple = func.exec(inputTuple);
    Assert.assertNotNull(resultTuple);
    Assert.assertEquals(resultTuple.size(), 1);
    Assert.assertEquals(resultTuple.get(0), 1.0);
}

Example 15 with ArrayOfDoublesUpdatableSketch

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

the class ArrayOfDoublesSketchToMeansTest method manyEntriesTwoValuesInputSketch.

@Test
public void manyEntriesTwoValuesInputSketch() throws Exception {
    EvalFunc<Tuple> func = new ArrayOfDoublesSketchToMeans();
    ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().setNumberOfValues(2).build();
    Random rand = new Random(0);
    // to saturate the sketch with default number of nominal entries (4K)
    int numKeys = 10000;
    for (int i = 0; i < numKeys; i++) {
        // two random values normally distributed with means of 0 and 1
        sketch.update(i, new double[] { rand.nextGaussian(), rand.nextGaussian() + 1.0 });
    }
    Assert.assertTrue(sketch.getRetainedEntries() >= 4096);
    Tuple inputTuple = PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray()));
    Tuple resultTuple = func.exec(inputTuple);
    Assert.assertNotNull(resultTuple);
    Assert.assertEquals(resultTuple.size(), 2);
    Assert.assertEquals((double) resultTuple.get(0), 0.0, 0.04);
    Assert.assertEquals((double) resultTuple.get(1), 1.0, 0.04);
}