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

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

math.ATAN2 implements a binding to the Java function {@link java.lang.Math#atan2(double,double) 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 DataAtom [double].
Return Value:: DataAtom [double]
Return Schema:: atan2_inputSchema
Example:: register math.jar; A = load 'mydata' using PigStorage() as ( float1 ); B = foreach A generate float1, math.ATAN2(float1);

@see Math#atan2(double,double) @see @author ajay garg

          double actual = (new Double(output.strval())).doubleValue();
          assertEquals(actual, expected, delta);
      }
   
   public void testATAN2() throws Exception {
          EvalFunc<DataAtom> ATAN2 = new ATAN2();
          Tuple tup = new Tuple(2);
          tup.setField(0, 0.5);
          tup.setField(1,0.6);
          DataAtom output = new DataAtom();
          ATAN2.exec(tup, output);
          double expected = Math.atan2(0.5,0.6);
          double actual = (new Double(output.strval())).doubleValue();
          assertEquals(actual, expected, delta);
      }

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

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