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

org.apache.pig.piggybank.evaluation.math.POW

math.POW implements a binding to the Java function {@link java.lang.Math#pow(double,double) Math.pow(double,double)}. Given a tuple with two data atom it Returns the the value of the first argument raised to the power of the second argument.

Parameters:: value - Tuple containing two DataAtom [double].
Return Value:: DataAtom [double]
Return Schema:: POW_inputSchema
Example:: register math.jar; A = load 'mydata' using PigStorage() as ( float1 ); B = foreach A generate float1, math.POW(float1);

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

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

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

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