Module ch.randelshofer.fastdoubleparser

Package ch.randelshofer.fastdoubleparser

Class FftMultiplier.ComplexVector

java.lang.Object

ch.randelshofer.fastdoubleparser.FftMultiplier.ComplexVector

Enclosing class:

FftMultiplier

static final class FftMultiplier.ComplexVector
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
private final double[]	a	This arrays contains complex numbers.
private static final int	COMPLEX_SIZE_SHIFT	A complex number in an FFT double[] vector occupies 2^1 array elements.
(package private) static final int	IMAG
private final int	length	The number of complex numbers stored in this vector.
private final int	offset	Offset to the real part of a complex number.
(package private) static final int	REAL

Constructor Summary

Constructors

Constructor	Description
ComplexVector(int length)
ComplexVector(FftMultiplier.ComplexVector c, int from, int to)	Creates a view on another vector.

Method Summary

Modifier and Type	Method	Description
(package private) void	add(int idxa, FftMultiplier.MutableComplex c)
(package private) void	addInto(int idxa, FftMultiplier.ComplexVector c, int idxc, FftMultiplier.MutableComplex destination)
(package private) void	addTimesIInto(int idxa, FftMultiplier.ComplexVector c, int idxc, FftMultiplier.MutableComplex destination)
(package private) void	applyInverseWeights(FftMultiplier.ComplexVector weights)	Multiplies the elements of an FFT vector by 1/weight.
(package private) void	applyWeights(FftMultiplier.ComplexVector weights)	Multiplies the elements of an FFT vector by weights.
(package private) void	copyInto(int idxa, FftMultiplier.MutableComplex destination)
(package private) double	imag(int idxa)
(package private) void	imag(int idxa, double value)
private int	imagIdx(int idxa)
(package private) void	multiply(int idxa, FftMultiplier.MutableComplex c)	Multiplies a by c.
(package private) void	multiplyByIAnd(int idxa, FftMultiplier.MutableComplex c)	Multiplies a by c and by i.
(package private) void	multiplyConjugate(int idxa, FftMultiplier.MutableComplex c)	Multiplies a by the conjugate of c.
(package private) void	multiplyConjugateInto(int idxa, FftMultiplier.MutableComplex c, FftMultiplier.MutableComplex destination)
(package private) void	multiplyConjugateTimesI(int idxa, FftMultiplier.MutableComplex c)	Multiplies (a[i].real,a[i+1].imaginary) by the conjugate of c and by i.
(package private) void	multiplyInto(int idxa, FftMultiplier.MutableComplex c, FftMultiplier.MutableComplex destination)
(package private) void	multiplyPointwise(FftMultiplier.ComplexVector cvec)
(package private) double	part(int idxa, int part)
(package private) double	real(int idxa)
(package private) void	real(int idxa, double value)
private int	realIdx(int idxa)
(package private) void	set(int idxa, double real, double imag)
(package private) void	squarePointwise()	The result is placed in the argument
(package private) void	subtractInto(int idxa, FftMultiplier.ComplexVector c, int idxc, FftMultiplier.MutableComplex destination)
(package private) void	subtractTimesIInto(int idxa, FftMultiplier.ComplexVector c, int idxc, FftMultiplier.MutableComplex destination)
(package private) void	timesTwoToThe(int idxa, int n)

Methods inherited from class java.lang.Object

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

Field Details

COMPLEX_SIZE_SHIFT

private static final int COMPLEX_SIZE_SHIFT

A complex number in an FFT double[] vector occupies 2^1 array elements.

See Also:

• Constant Field Values

IMAG

static final int IMAG

See Also:

• Constant Field Values

REAL

static final int REAL

See Also:

• Constant Field Values

a

private final double[] a

This arrays contains complex numbers.

A complex number occupies 2 consecutive array elements: the real part and then the imaginary part.

length

private final int length

The number of complex numbers stored in this vector.

offset

private final int offset

Offset to the real part of a complex number.

Constructor Details

ComplexVector

ComplexVector(int length)

ComplexVector

ComplexVector(FftMultiplier.ComplexVector c,
 int from,
 int to)

Creates a view on another vector.

Parameters:

c - the other vector

from - start index of the view

to - end index of the view

Method Details

add

void add(int idxa,
 FftMultiplier.MutableComplex c)

addInto

void addInto(int idxa,
 FftMultiplier.ComplexVector c,
 int idxc,
 FftMultiplier.MutableComplex destination)

addTimesIInto

void addTimesIInto(int idxa,
 FftMultiplier.ComplexVector c,
 int idxc,
 FftMultiplier.MutableComplex destination)

applyInverseWeights

void applyInverseWeights(FftMultiplier.ComplexVector weights)

Multiplies the elements of an FFT vector by 1/weight. Used for the right-angle convolution.

applyWeights

void applyWeights(FftMultiplier.ComplexVector weights)

Multiplies the elements of an FFT vector by weights. Doing this makes a regular FFT convolution a right-angle convolution.

copyInto

void copyInto(int idxa,
 FftMultiplier.MutableComplex destination)

imag

double imag(int idxa)

imag

void imag(int idxa,
 double value)

imagIdx

private int imagIdx(int idxa)

multiply

void multiply(int idxa,
 FftMultiplier.MutableComplex c)

Multiplies a by c. Stores the result in a[idx] and a[idx+1].

multiplyByIAnd

void multiplyByIAnd(int idxa,
 FftMultiplier.MutableComplex c)

Multiplies a by c and by i. Stores the result in a[idx] and a[idx+1].

multiplyConjugate

void multiplyConjugate(int idxa,
 FftMultiplier.MutableComplex c)

Multiplies a by the conjugate of c. Stores the result in a[i] and a[i+1].

multiplyConjugateInto

void multiplyConjugateInto(int idxa,
 FftMultiplier.MutableComplex c,
 FftMultiplier.MutableComplex destination)

multiplyConjugateTimesI

void multiplyConjugateTimesI(int idxa,
 FftMultiplier.MutableComplex c)

Multiplies (a[i].real,a[i+1].imaginary) by the conjugate of c and by i. Stores the result in a[i] and a[i+1].

multiplyInto

void multiplyInto(int idxa,
 FftMultiplier.MutableComplex c,
 FftMultiplier.MutableComplex destination)

multiplyPointwise

void multiplyPointwise(FftMultiplier.ComplexVector cvec)

part

double part(int idxa,
 int part)

real

double real(int idxa)

real

void real(int idxa,
 double value)

realIdx

private int realIdx(int idxa)

set

void set(int idxa,
 double real,
 double imag)

squarePointwise

void squarePointwise()

The result is placed in the argument

subtractInto

void subtractInto(int idxa,
 FftMultiplier.ComplexVector c,
 int idxc,
 FftMultiplier.MutableComplex destination)

subtractTimesIInto

void subtractTimesIInto(int idxa,
 FftMultiplier.ComplexVector c,
 int idxc,
 FftMultiplier.MutableComplex destination)

timesTwoToThe

void timesTwoToThe(int idxa,
 int n)