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

Example 26 with ArrayOfDoublesSketch

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

the class ArrayOfDoublesSketchToVariances method exec.

@Override
public Tuple exec(final Tuple input) throws IOException {
    if ((input == null) || (input.size() == 0)) {
        return null;
    }
    final DataByteArray dba = (DataByteArray) input.get(0);
    final ArrayOfDoublesSketch sketch = ArrayOfDoublesSketches.wrapSketch(Memory.wrap(dba.get()));
    if (sketch.getRetainedEntries() < 1) {
        return null;
    }
    final SummaryStatistics[] summaries = ArrayOfDoublesSketchStats.sketchToSummaryStatistics(sketch);
    final Tuple variances = TupleFactory.getInstance().newTuple(sketch.getNumValues());
    for (int i = 0; i < sketch.getNumValues(); i++) {
        variances.set(i, summaries[i].getVariance());
    }
    return variances;
}