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

java.lang.Object
  extended by org.apache.pig.EvalFunc<Double>
      extended by org.apache.pig.piggybank.evaluation.math.Base
          extended by org.apache.pig.piggybank.evaluation.math.DoubleBase
              extended by 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
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, getInputSchema, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, isAsynchronous, progress, 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()


Copyright © 2007-2012 The Apache Software Foundation