org.apache.datasketches.pig.tuple

Class ArrayOfDoublesSketchToQuantilesSketch

java.lang.Object

org.apache.pig.EvalFunc<org.apache.pig.data.DataByteArray>

org.apache.datasketches.pig.tuple.ArrayOfDoublesSketchToQuantilesSketch

public class ArrayOfDoublesSketchToQuantilesSketch
extends org.apache.pig.EvalFunc<org.apache.pig.data.DataByteArray>

This UDF converts a given column of double values from an ArrayOfDoubles sketch to a quantiles DoublesSketch to further analyze the distribution of these values. The result will be a DataByteArray with serialized quantiles sketch.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.pig.EvalFunc

org.apache.pig.EvalFunc.SchemaType

Field Summary

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

Constructors

Constructor and Description
ArrayOfDoublesSketchToQuantilesSketch() Constructor with default parameter k for quantiles sketch
ArrayOfDoublesSketchToQuantilesSketch(String k) Constructor with a given parameter k for quantiles sketch

Method Summary

Modifier and Type	Method and Description
org.apache.pig.data.DataByteArray	exec(org.apache.pig.data.Tuple input)

Methods inherited from class org.apache.pig.EvalFunc

allowCompileTimeCalculation, finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLoadCaster, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, needEndOfAllInputProcessing, outputSchema, progress, setEndOfAllInput, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warn

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ArrayOfDoublesSketchToQuantilesSketch

public ArrayOfDoublesSketchToQuantilesSketch()

Constructor with default parameter k for quantiles sketch

ArrayOfDoublesSketchToQuantilesSketch

public ArrayOfDoublesSketchToQuantilesSketch(String k)

Constructor with a given parameter k for quantiles sketch

Parameters:

k - string representation of the parameter k that determines the accuracy and size of the quantiles sketch

Method Detail

exec

public org.apache.pig.data.DataByteArray exec(org.apache.pig.data.Tuple input)
                                       throws IOException

Specified by:

exec in class org.apache.pig.EvalFunc<org.apache.pig.data.DataByteArray>

Throws:

IOException