org.das2.qds.math.fft

Class ComplexArray

java.lang.Object

org.das2.qds.math.fft.ComplexArray

public class ComplexArray
extends java.lang.Object

Interface for passing complex arrays to and from FFT routines. The intent is that the complex array can be backed by data in any format. Each elements is readable and writeable via get and set methods for the real and imaginary components.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ComplexArray.ComplexArrayDoubleDouble Implements ComplexArray that is backed by two float arrays.
static class	ComplexArray.ComplexArrayFloatFloat Implements ComplexArray that is backed by two float arrays.
static interface	ComplexArray.Double ComplexArray that is accessed by doubles
static interface	ComplexArray.Float A complex array that is accessed by floats

Constructor Summary

Constructors

Constructor and Description
ComplexArray()

Method Summary

Modifier and Type	Method and Description
static double[]	magnitude(ComplexArray.Double array) returns the magnitudes of each element in an array
static double	magnitude(ComplexArray.Double array, int i) returns the magnitude of ah element in an array
static double	magnitude2(ComplexArray.Double array, int i) returns the magnitude of an element in an array.
static ComplexArray.Double	newArray(double[] real) Creates a new ComplexArray from an array of real numbers.
static ComplexArray.Double	newArray(double[] real, double[] imag) Creates a new ComplexArray from an array representing real numbers and an array representing the corresponding complex components.
static ComplexArray.Float	newArray(float[] real) Creates a new ComplexArray from an array of real numbers.
static ComplexArray.Float	newArray(float[] real, float[] imag) Creates a new ComplexArray from an array representing real numbers and an array representing the corresponding complex components.
static ComplexArray.Double	newArrayCopy(double[] real) Creates a new ComplexArray from a float array representing real numbers, but copies the original array so that it is not modified.
static double[]	realPart(ComplexArray.Double array) returns the real parts of each element in an array.
static java.lang.String	toString(ComplexArray.Double array) converts a ComplexArray into an array for debugging purposes.
static java.lang.String	toString(ComplexArray.Float array) converts a ComplexArray into an array for debugging purposes.

Methods inherited from class java.lang.Object

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

Constructor Detail

ComplexArray

public ComplexArray()

Method Detail

newArray

public static ComplexArray.Double newArray(double[] real)

Creates a new ComplexArray from an array of real numbers. The complex components of each element in the resulting array is zero.

newArrayCopy

public static ComplexArray.Double newArrayCopy(double[] real)

Creates a new ComplexArray from a float array representing real numbers, but copies the original array so that it is not modified.

newArray

public static ComplexArray.Double newArray(double[] real,
                                           double[] imag)

Creates a new ComplexArray from an array representing real numbers and an array representing the corresponding complex components.

newArray

public static ComplexArray.Float newArray(float[] real)

Creates a new ComplexArray from an array of real numbers. The complex components of each element in the resulting array is zero.

newArray

public static ComplexArray.Float newArray(float[] real,
                                          float[] imag)

Creates a new ComplexArray from an array representing real numbers and an array representing the corresponding complex components.

toString

public static java.lang.String toString(ComplexArray.Float array)

converts a ComplexArray into an array for debugging purposes.

toString

public static java.lang.String toString(ComplexArray.Double array)

converts a ComplexArray into an array for debugging purposes.

realPart

public static double[] realPart(ComplexArray.Double array)

returns the real parts of each element in an array.

magnitude

public static double[] magnitude(ComplexArray.Double array)

returns the magnitudes of each element in an array

magnitude2

public static final double magnitude2(ComplexArray.Double array,
                                      int i)

returns the magnitude of an element in an array.

Parameters:

array - the complex array.

i - the element index

magnitude

public static final double magnitude(ComplexArray.Double array,
                                     int i)

returns the magnitude of ah element in an array