| /* |
| * Copyright 2016, Yahoo! Inc. Licensed under the terms of the Apache License 2.0. See LICENSE file |
| * at the project root for terms. |
| */ |
| /** |
| * Pig UDFs for Tuple sketches. |
| * Tuple sketches are based on the idea of Theta sketches with the addition of |
| * values associated with unique keys. |
| * Two sets of tuple sketch classes are available at the moment: |
| * generic Tuple sketches with user-defined Summary, and a faster specialized |
| * implementation with an array of double values. |
| * |
| * <p>There are two sets of Pig UDFs: one for generic Tuple sketch with an example |
| * implementation for DoubleSummay, and another one for a specialized ArrayOfDoublesSketch. |
| * |
| * <p> The generic implementation is in the form of abstract classes DataToSketch and |
| * UnionSketch to be specialized for particular types of Summary. |
| * An example implementation for DoubleSumamry is provided: DataToDoubleSummarySketch and |
| * UnionDoubleSummarySketch, as well as UDFs to obtain the results from sketches: |
| * DoubleSumamrySketchToEstimates and DoubleSummarySketchToPercentile. |
| * |
| * <p>UDFs for ArrayOfDoublesSketch: DataToArrayOfDoublesSketch, UnionArrayOfDoublesSketch, |
| * ArrayOfDoublesSketchToEstimates. |
| * |
| * @author Alexander Saydakov |
| */ |
| package com.yahoo.sketches.pig.tuple; |
