org.apache.pig.piggybank.evaluation.math

Class EXPM1

java.lang.Object

org.apache.pig.EvalFunc<Double>

org.apache.pig.piggybank.evaluation.math.Base

org.apache.pig.piggybank.evaluation.math.DoubleBase

org.apache.pig.piggybank.evaluation.math.EXPM1

public class EXPM1
extends DoubleBase

math.EXPM1 implements a binding to the Java function Math.expm1(double). Given a single data atom it returns exp(input)+1

Parameters:

value - Double.

Return Value:

Double

Return Schema:

expm1_inputSchema

Example:

register math.jar;
A = load 'mydata' using PigStorage() as ( float1 );
B = foreach A generate float1, math.expm1(float1);

Author:

ajay garg

See Also:

Math.expm1(double),

Nested Class Summary

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

EvalFunc.SchemaType

Field Summary

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

Constructors

Constructor and Description
EXPM1()

Method Summary

Methods inherited from class org.apache.pig.piggybank.evaluation.math.DoubleBase

exec, getArgToFuncMapping

Methods inherited from class org.apache.pig.piggybank.evaluation.math.Base

outputSchema

Methods inherited from class org.apache.pig.EvalFunc

allowCompileTimeCalculation, finish, getCacheFiles, getInputSchema, getLoadCaster, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, needEndOfAllInputProcessing, 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

EXPM1

public EXPM1()