org.apache.datasketches.pig.quantiles

Class GetQuantileFromDoublesSketch

java.lang.Object

org.apache.pig.EvalFunc<Double>

org.apache.datasketches.pig.quantiles.GetQuantileFromDoublesSketch

public class GetQuantileFromDoublesSketch
extends org.apache.pig.EvalFunc<Double>

This UDF is to get a quantile value from a DoublesSketch. A single value for a given fraction is returned. The fraction represents a normalized rank and must be from 0 to 1 inclusive. For example, the fraction of 0.5 corresponds to 50th percentile, which is the median value of the distribution (the number separating the higher half of the probability distribution from the lower half).

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
GetQuantileFromDoublesSketch()

Method Summary

Modifier and Type	Method and Description
Double	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

GetQuantileFromDoublesSketch

public GetQuantileFromDoublesSketch()

Method Detail

exec

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

Specified by:

exec in class org.apache.pig.EvalFunc<Double>

Throws:

IOException