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

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.DoubleDoubleBase
              extended by 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
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
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

ATAN2

public ATAN2()


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