cern.colt.matrix.tfcomplex.impl

Class DenseLargeFComplexMatrix2D

java.lang.Object

cern.colt.PersistentObject

cern.colt.matrix.AbstractMatrix

cern.colt.matrix.AbstractMatrix2D

cern.colt.matrix.tfcomplex.FComplexMatrix2D

cern.colt.matrix.tfcomplex.impl.WrapperFComplexMatrix2D

cern.colt.matrix.tfcomplex.impl.DenseLargeFComplexMatrix2D

All Implemented Interfaces:

Serializable, Cloneable

public class DenseLargeFComplexMatrix2D
extends WrapperFComplexMatrix2D

Dense 2-d matrix holding complex elements.
Implementation:

This data structure allows to store more than 2^31 elements. Internally holds one two-dimensional array, elements[rows][2*columns]. Complex data is represented by 2 float values in sequence, i.e. elements[row][2*column] constitute the real part and elements[row][2*column+1] constitute the imaginary part. Note that this implementation is not synchronized.

Author:

Piotr Wendykier (piotr.wendykier@gmail.com)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DenseLargeFComplexMatrix2D(int rows, int columns)

Method Summary

Methods

Modifier and Type	Method and Description
float[][]	elements() Returns the elements of this matrix.
void	fft2() Computes the 2D discrete Fourier transform (DFT) of this matrix.
void	fftColumns() Computes the discrete Fourier transform (DFT) of each column of this matrix.
void	fftRows() Computes the discrete Fourier transform (DFT) of each row of this matrix.
float[]	getQuick(int row, int column) Returns the matrix cell value at coordinate [row,column].
void	ifft2(boolean scale) Computes the 2D inverse of the discrete Fourier transform (IDFT) of this matrix.
void	ifftColumns(boolean scale) Computes the inverse of the discrete Fourier transform (IDFT) of each column of this matrix.
void	ifftRows(boolean scale) Computes the inverse of the discrete Fourier transform (IDFT) of each row of this matrix.
FComplexMatrix2D	like(int rows, int columns) Construct and returns a new empty matrix of the same dynamic type as the receiver, having the specified number of rows and columns.
FComplexMatrix1D	like1D(int size) Construct and returns a new 1-d matrix of the corresponding dynamic type, entirelly independent of the receiver.
void	setQuick(int row, int column, float[] value) Sets the matrix cell at coordinate [row,column] to the specified value.
void	setQuick(int row, int column, float re, float im) Sets the matrix cell at coordinate [row,column] to the specified value.

Methods inherited from class cern.colt.matrix.tfcomplex.impl.WrapperFComplexMatrix2D

assign, equals, equals, getImaginaryPart, getRealPart, vectorize, viewColumn, viewColumnFlip, viewDice, viewPart, viewRow, viewRowFlip, viewSelection, viewStrides

Methods inherited from class cern.colt.matrix.tfcomplex.FComplexMatrix2D

aggregate, aggregate, assign, assign, assign, assign, assign, assign, assign, assign, assign, assignImaginary, assignReal, cardinality, copy, forEachNonZero, get, getConjugateTranspose, getNonZeros, like, set, set, toArray, toString, toString, viewSelection, zMult, zMult, zMult, zMult, zSum

Methods inherited from class cern.colt.matrix.AbstractMatrix2D

checkShape, checkShape, columns, columnStride, index, rows, rowStride, size, toStringShort

Methods inherited from class cern.colt.matrix.AbstractMatrix

ensureCapacity, isView, trimToSize

Methods inherited from class cern.colt.PersistentObject

clone

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DenseLargeFComplexMatrix2D

public DenseLargeFComplexMatrix2D(int rows,
                          int columns)

Method Detail

fft2

public void fft2()

Computes the 2D discrete Fourier transform (DFT) of this matrix.

Overrides:

fft2 in class WrapperFComplexMatrix2D

fftColumns

public void fftColumns()

Computes the discrete Fourier transform (DFT) of each column of this matrix.

Overrides:

fftColumns in class WrapperFComplexMatrix2D

fftRows

public void fftRows()

Computes the discrete Fourier transform (DFT) of each row of this matrix.

Overrides:

fftRows in class WrapperFComplexMatrix2D

ifft2

public void ifft2(boolean scale)

Computes the 2D inverse of the discrete Fourier transform (IDFT) of this matrix.

Overrides:

ifft2 in class WrapperFComplexMatrix2D

Parameters:

scale - if true then scaling is performed

ifftColumns

public void ifftColumns(boolean scale)

Computes the inverse of the discrete Fourier transform (IDFT) of each column of this matrix.

Overrides:

ifftColumns in class WrapperFComplexMatrix2D

Parameters:

scale - if true then scaling is performed

ifftRows

public void ifftRows(boolean scale)

Computes the inverse of the discrete Fourier transform (IDFT) of each row of this matrix.

Overrides:

ifftRows in class WrapperFComplexMatrix2D

Parameters:

scale - if true then scaling is performed

getQuick

public float[] getQuick(int row,
               int column)

Description copied from class: FComplexMatrix2D

Returns the matrix cell value at coordinate [row,column].

Provided with invalid parameters this method may return invalid objects without throwing any exception. You should only use this method when you are absolutely sure that the coordinate is within bounds. Precondition (unchecked): 0 <= column < columns() && 0 <= row < rows().

Overrides:

getQuick in class WrapperFComplexMatrix2D

Parameters:

row - the index of the row-coordinate.

column - the index of the column-coordinate.

Returns:

the value at the specified coordinate.

setQuick

public void setQuick(int row,
            int column,
            float[] value)

Description copied from class: FComplexMatrix2D

Sets the matrix cell at coordinate [row,column] to the specified value.

Provided with invalid parameters this method may access illegal indexes without throwing any exception. You should only use this method when you are absolutely sure that the coordinate is within bounds. Precondition (unchecked): 0 <= column < columns() && 0 <= row < rows().

Overrides:

setQuick in class WrapperFComplexMatrix2D

Parameters:

row - the index of the row-coordinate.

column - the index of the column-coordinate.

value - the value to be filled into the specified cell.

setQuick

public void setQuick(int row,
            int column,
            float re,
            float im)

Description copied from class: FComplexMatrix2D

Sets the matrix cell at coordinate [row,column] to the specified value.

Provided with invalid parameters this method may access illegal indexes without throwing any exception. You should only use this method when you are absolutely sure that the coordinate is within bounds. Precondition (unchecked): 0 <= column < columns() && 0 <= row < rows().

Overrides:

setQuick in class WrapperFComplexMatrix2D

Parameters:

row - the index of the row-coordinate.

column - the index of the column-coordinate.

re - the real part of the value to be filled into the specified cell.

im - the imaginary part of the value to be filled into the specified cell.

elements

public float[][] elements()

Description copied from class: FComplexMatrix2D

Returns the elements of this matrix.

Overrides:

elements in class WrapperFComplexMatrix2D

Returns:

the elements

like

public FComplexMatrix2D like(int rows,
                    int columns)

Description copied from class: FComplexMatrix2D

Construct and returns a new empty matrix of the same dynamic type as the receiver, having the specified number of rows and columns. For example, if the receiver is an instance of type DenseComplexMatrix2D the new matrix must also be of type DenseComplexMatrix2D. In general, the new matrix should have internal parametrization as similar as possible.

Overrides:

like in class WrapperFComplexMatrix2D

Parameters:

rows - the number of rows the matrix shall have.

columns - the number of columns the matrix shall have.

Returns:

a new empty matrix of the same dynamic type.

like1D

public FComplexMatrix1D like1D(int size)

Description copied from class: FComplexMatrix2D

Construct and returns a new 1-d matrix of the corresponding dynamic type, entirelly independent of the receiver. For example, if the receiver is an instance of type DenseComplexMatrix2D the new matrix must be of type DenseComplexMatrix1D.

Overrides:

like1D in class WrapperFComplexMatrix2D

Parameters:

size - the number of cells the matrix shall have.

Returns:

a new matrix of the corresponding dynamic type.