Examples of org.apache.commons.math.complex.Complex

org.apache.commons.math.complex.Complex
Representation of a Complex number - a number which has both a real and imaginary part.
Implementations of arithmetic operations handle NaN and infinite values according to the rules for {@link java.lang.Double}arithmetic, applying definitional formulas and returning NaN or infinite values in real or imaginary parts as these arise in computation. See individual method javadocs for details.

{@link #equals} identifies all values with NaN in either realor imaginary part - e.g.,
```
 1 + NaNi  == NaN + i == NaN + NaNi.
```
implements Serializable since 2.0 @version $Revision: 990655 $ $Date: 2010-08-29 23:49:40 +0200 (dim. 29 août 2010) $


  private static ComplexVector toComplex(double[] array) {
    int n = array.length / 2;
    ComplexArrayVector.Builder result = new ComplexArrayVector.Builder(0, n);
    for(int i=0;i!=n;++i) {
      result.add(new Complex(array[i*2], array[i*2+1]));
    }
    return result.build();
  }

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    }
  }
  
  @Override
  public Complex getElementAsComplex(int index) {
    return new Complex(getElementAsDouble(index), 0);
  }

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  }
  
  @Builtin("-")
  @DataParallel(PreserveAttributeStyle.ALL)
  public static Complex negative(Complex x) {
    return new Complex(-x.getReal(), -x.getImaginary());
  }

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        double rd = convertInf(d);
        x = 0.0 * (a * rc + b * rd);
        y = 0.0 * (b * rc - a * rd);
      }
    }
    return new Complex(x, y);
  }

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      if (recalc) {
        real = Double.POSITIVE_INFINITY * (ra * rc - rb * rd);
        imag = Double.POSITIVE_INFINITY * (ra * rd + rb * rc);
      }
    }
    return new Complex(real, imag);
  }

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  public static Complex power(Complex x, Complex y) {
    // handle common cases with better precision than the log(exp(x)*y) trick used by Apache Commons
    if(y.getImaginary() == 0) {
      double yr = y.getReal();
      if(yr == 0) {
        return new Complex(1, 0);
      } else if (yr == 1) {
        return x;
      } else {
        int k = (int)yr;
        if(k == yr && k < 65536) {

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   */
  private static Complex power(Complex x, int k) {
    if(k < 0) {
      return reciprocal(power(x, -k));
    } else {
      Complex result = new Complex(1, 0);
      while(k > 0) {
        result = multiply(result, x);
        k--;
      }
      return result;

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        double rd = convertInf(d);
        x = 0.0 * rc;
        y = 0.0 * (-rd);
      }
    }
    return new Complex(x, y);
  }

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  private SEXP readComplexExp(int flags) throws IOException {
    int length = in.readInt();
    Complex[] values = new Complex[length];
    for(int i=0;i!=length;++i) {
      values[i] = new Complex(in.readDouble(), in.readDouble());
    }
    return new ComplexArrayVector(values, readAttributes(flags));
  }

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    return new IntArrayVector(getElementAsInt(index));
  }


  @Override
  public Complex getElementAsComplex(int index) {
    return new Complex(getElementAsDouble(index), 0);
  }

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