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),

Field Summary

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

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

finish, getCacheFiles, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, isAsynchronous, progress, setPigLogger, setReporter, warn

Methods inherited from class java.lang.Object

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

Constructor Detail

EXPM1

public EXPM1()