Examples of Signum

org.apache.commons.math3.analysis.function.Signum
{@code signum} function. @since 3.0
org.apache.pig.piggybank.evaluation.math.SIGNUM
math.SIGNUM implements a binding to the Java function {@link java.lang.Math#signum(double) Math.signum(double)}. Given a single data atom it Returns the signum function of the argument.

Parameters:

value - DataAtom [double].

Return Value:

DataAtom [double]

Return Schema:

SIGNUM_inputSchema

Example:

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

@see Math#signum(double) @see @author ajay garg

Examples of org.apache.commons.math3.analysis.function.Signum

        return new UnivariateFunction[] {
            new Power(2.0), new Exp(), new Expm1(),
            new Log1p(), new Cosh(), new Sinh(), new Tanh(), new Cos(),
            new Sin(), new Tan(), new Acos(), new Asin(), new Atan(),
            new Abs(), new Sqrt(), new Cbrt(), new Ceil(),
            new Floor(), new Rint(), new Signum()
        };
    }

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Examples of org.apache.commons.math3.analysis.function.Signum

        return new UnivariateFunction[] {
            new Power(2.0), new Exp(), new Expm1(),
            new Log1p(), new Cosh(), new Sinh(), new Tanh(), new Cos(),
            new Sin(), new Tan(), new Acos(), new Asin(), new Atan(),
            new Abs(), new Sqrt(), new Cbrt(), new Ceil(),
            new Floor(), new Rint(), new Signum()
        };
    }

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Examples of org.apache.commons.math3.analysis.function.Signum

        return new UnivariateFunction[] {
            new Power(2.0), new Exp(), new Expm1(), new Log(), new Log10(),
            new Log1p(), new Cosh(), new Sinh(), new Tanh(), new Cos(),
            new Sin(), new Tan(), new Acos(), new Asin(), new Atan(),
            new Inverse(), new Abs(), new Sqrt(), new Cbrt(), new Ceil(),
            new Floor(), new Rint(), new Signum(), new Ulp()
        };
    }

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Examples of org.apache.commons.math3.analysis.function.Signum

        return new UnivariateFunction[] {
            new Power(2.0), new Exp(), new Expm1(), new Log(), new Log10(),
            new Log1p(), new Cosh(), new Sinh(), new Tanh(), new Cos(),
            new Sin(), new Tan(), new Acos(), new Asin(), new Atan(),
            new Inverse(), new Abs(), new Sqrt(), new Cbrt(), new Ceil(),
            new Floor(), new Rint(), new Signum(), new Ulp()
        };
    }

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Examples of org.apache.commons.math3.analysis.function.Signum

        v_mapRintToSelf.mapToSelf(new Rint());
        double[] result_mapRintToSelf =  {-1d,1d,1d};
        assertClose("compare vectors" ,result_mapRintToSelf,v_mapRintToSelf.toArray(),normTolerance);


        //octave =  ???
        RealVector v_mapSignum = ceil_v.map(new Signum());
        double[] result_mapSignum = {-1d,1d,1d};
        assertClose("compare vectors" ,result_mapSignum,v_mapSignum.toArray(),normTolerance);


        //octave = ???
        RealVector v_mapSignumToSelf = ceil_v.copy();
        v_mapSignumToSelf.mapToSelf(new Signum());
        double[] result_mapSignumToSelf =  {-1d,1d,1d};
        assertClose("compare vectors" ,result_mapSignumToSelf,v_mapSignumToSelf.toArray(),normTolerance);




        // Is with the used resolutions of limited value as test

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Examples of org.apache.commons.math3.analysis.function.Signum

        v_mapRintToSelf.mapToSelf(new Rint());
        double[] result_mapRintToSelf =  {-1d,1d,1d};
        assertClose("compare vectors" ,result_mapRintToSelf,v_mapRintToSelf.toArray(),normTolerance);


        //octave =  ???
        RealVector v_mapSignum = ceil_v.map(new Signum());
        double[] result_mapSignum = {-1d,1d,1d};
        assertClose("compare vectors" ,result_mapSignum,v_mapSignum.toArray(),normTolerance);


        //octave = ???
        RealVector v_mapSignumToSelf = ceil_v.copy();
        v_mapSignumToSelf.mapToSelf(new Signum());
        double[] result_mapSignumToSelf =  {-1d,1d,1d};
        assertClose("compare vectors" ,result_mapSignumToSelf,v_mapSignumToSelf.toArray(),normTolerance);




        // Is with the used resolutions of limited value as test

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

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

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