org.apache.pig.piggybank.evaluation.math

Class ATAN2

java.lang.Object

org.apache.pig.EvalFunc<java.lang.Double>

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

org.apache.pig.piggybank.evaluation.math.DoubleDoubleBase

org.apache.pig.piggybank.evaluation.math.ATAN2

public class ATAN2
extends DoubleDoubleBase

math.ATAN2 implements a binding to the Java function Math.atan2(double,double). Given a tuple with two data atom x and y it will returns the angle theta from the conversion of rectangular coordinates (x, y) to polar coordinates (r, theta).

Parameters:

value - Tuple containing two Double.

Return Value:

Double

Return Schema:

atan2_inputSchema

Example:

register math.jar;
A = load 'mydata' using PigStorage() as ( float1 );
B = foreach A generate float1, math.ATAN2(float1);

Author:

ajay garg

See Also:

Math.atan2(double,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
ATAN2()

Method Summary

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

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, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, 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

ATAN2

public ATAN2()