drcl.util.scalar
Class Complex

java.lang.Object
  drcl.util.scalar.Complex

public class Complex

extends java.lang.Object

This class implements complex numbers. It provides basic operations such as addition, subtraction, multiplication, division and absolute values.

Version:

1.0 02/04/2004

Author:

Honghai Zhang

Constructor Summary

Complex()
Constructs a Complex 0.

Complex(Complex z)
Constructs a Comlex equal to z.

Complex(double re, double im)
Constructs a Complex re + i * im.

Method Summary

static double	abs(Complex z) Returns the absolute value (modulus) of a Complex, |z|.
static Complex	add(Complex y, Complex z) Returns the sum of Complex y and Complex z.
static Complex	add(Complex y, double x) Returns the sum of Complex y and double x.
static Complex	add(double x, Complex y) Returns the sum of double x and Complex y.
Complex	conjugate() Returns the conjugate of this current Complex.
static Complex	divide(Complex y, Complex z) Returns a Complex y/z for Complex y and Complex z.
double	imag() Returns the imaginary part of the Complex.
static Complex	multiply(Complex y, Complex z) Returns the product of two complex number
static Complex	multiply(Complex z, double x) Returns the product of a complex z with a real number x.
static Complex	multiply(double x, Complex z) Returns the product of a real number x with a complex z.
double	real() Returns the real part of the Complex.
void	setImag(double im) Sets the Imaginary part of the Complex number.
void	setReal(double re) Sets the real part of the Complex number.
static Complex	sqrt(Complex z) Returns the square root of a Complex number z.
static Complex	subtract(Complex y, Complex z) Returns y -z for Complex y and Complex z.
static Complex	subtract(Complex y, double x) Returns y - x for Complex y and double x.
static Complex	subtract(double x, Complex z) Returns x - z for double x and Complex z.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Complex

public Complex()

Constructs a Complex 0.

Complex

public Complex(double re,
               double im)

Constructs a Complex re + i * im.

Complex

public Complex(Complex z)

Constructs a Comlex equal to z.

Method Detail

setReal

public void setReal(double re)

Sets the real part of the Complex number.

setImag

public void setImag(double im)

Sets the Imaginary part of the Complex number.

abs

public static double abs(Complex z)

Returns the absolute value (modulus) of a Complex, |z|.

conjugate

public Complex conjugate()

Returns the conjugate of this current Complex.

real

public double real()

Returns the real part of the Complex.

imag

public double imag()

Returns the imaginary part of the Complex.

multiply

public static Complex multiply(Complex y,
                               Complex z)

Returns the product of two complex number

multiply

public static Complex multiply(Complex z,
                               double x)

Returns the product of a complex z with a real number x.

multiply

public static Complex multiply(double x,
                               Complex z)

Returns the product of a real number x with a complex z.

sqrt

public static Complex sqrt(Complex z)

Returns the square root of a Complex number z. Its real part is always nonegative and imaginary part is nonnegative if it can be chosen.

divide

public static Complex divide(Complex y,
                             Complex z)

Returns a Complex y/z for Complex y and Complex z.

add

public static Complex add(Complex y,
                          Complex z)

Returns the sum of Complex y and Complex z.

add

public static Complex add(Complex y,
                          double x)

Returns the sum of Complex y and double x.

add

public static Complex add(double x,
                          Complex y)

Returns the sum of double x and Complex y.

subtract

public static Complex subtract(Complex y,
                               Complex z)

Returns y -z for Complex y and Complex z.

subtract

public static Complex subtract(Complex y,
                               double x)

Returns y - x for Complex y and double x.

subtract

public static Complex subtract(double x,
                               Complex z)

Returns x - z for double x and Complex z.