Tool for performing fast fourier transform (FFT) on grids of Complex and real numbers. More...

Static Public Member Functions
static Complex[]	transform (double[] originalData)
	Transform a 1D array of real numbers into an array of complex numbers. More...

static Complex[][]	transform (double[][] originalData)
	Transform a 2D array of real numbers into an array of complex numbers. More...

static Complex[][][]	transform (double[][][] originalData)
	Transform a 3D array of real numbers into an array of complex numbers. More...

static Complex[]	transform (Complex[] originalData)
	Transform a 1D array of Complex numbers into an array of complex numbers. More...

static Complex[][]	transform (Complex[][] originalData)
	Transform a 2D array of Complex numbers into an array of complex numbers. More...

static Complex[][][]	transform (Complex[][][] originalData)
	Transform a 3D array of Complex numbers into an array of complex numbers. More...

static Complex[]	inverse (Complex[] originalData)
	Inverse transform a 1D array of complex numbers. More...

static Complex[][]	inverse (Complex[][] originalData)
	Inverse transform a 2D array of complex numbers. More...

static Complex[][][]	inverse (Complex[][][] originalData)
	Inverse transform a 3D array of complex numbers. More...

static double[]	fft (double[] data, int isign)
	Perform a Fast Fourier Transformation on 1D data array. More...

static double[]	fftn (double[] data, int ndim, int[] nn, int isign)
	Perform a Fast Fourier Transformation on n-D data array . More...

static boolean	checkPowerOfTwo (int n)
	Checks whether n is an integer power of 2. More...

Detailed Description

Tool for performing fast fourier transform (FFT) on grids of Complex and real numbers.

Tool for performing fast fourier transform (FFT) on grids of Complex and real numbers. Algorithms for FFT based on "Numerical Recipes in C, 2nd ed."

Author: Andreas Dotsch (andre.nosp@m.as.d.nosp@m.oetsc.nosp@m.h@he.nosp@m.lmhol.nosp@m.tz-h.nosp@m.zi.de), Helmholtz Centre for Infection Research (Germany)

Member Function Documentation

static boolean utils.FftOperations.checkPowerOfTwo ( int n )

static

Checks whether n is an integer power of 2.

Checks whether n is an integer power of 2

Parameters

n	Integer to check

Returns: Boolean noting whether this number is a power of 2

static double [] utils.FftOperations.fft	(	double[]	data,
		int	isign
	)

static

Perform a Fast Fourier Transformation on 1D data array.

Parameters

data	data array to perform FFT on
isign	1 for regular FFT, -1 for inverse (result is NOT normalized by N!)

Returns: Double array of transformed data

static double [] utils.FftOperations.fftn	(	double[]	data,
		int	ndim,
		int[]	nn,
		int	isign
	)

static

Perform a Fast Fourier Transformation on n-D data array .

Parameters

data	data array to perform FFT on
ndim	number of dimensions
nn	size of the array data in all directions
isign	1 for regular FFT, -1 for inverse (result is NOT normalized by N!)

Returns: Double array of the data transformed to a 1D array of doubles

static Complex [] utils.FftOperations.inverse ( Complex[] originalData )

static

Inverse transform a 1D array of complex numbers.

Inverse transform a 1D array of complex numbers

Parameters

originalData Data of complex numbers to be transformed

Returns: Inverse of the original data array

static Complex [][] utils.FftOperations.inverse ( Complex originalData[][] )

static

Inverse transform a 2D array of complex numbers.

Inverse transform a 2D array of complex numbers

Parameters

originalData Data of complex numbers to be transformed

Returns: Inverse of the original data array

static Complex [][][] utils.FftOperations.inverse ( Complex originalData[][][] )

static

Inverse transform a 3D array of complex numbers.

Inverse transform a 3D array of complex numbers

Parameters

originalData Data of complex numbers to be transformed

Returns: Inverse of the original data array

static Complex [] utils.FftOperations.transform ( double[] originalData )

static

Transform a 1D array of real numbers into an array of complex numbers.

Transform a 1D array of real numbers into an array of complex numbers

Parameters

originalData Original data

Returns: Array of complex numbers representing this data

static Complex [][] utils.FftOperations.transform ( double originalData[][] )

static

Transform a 2D array of real numbers into an array of complex numbers.

Transform a 2D array of real numbers into an array of complex numbers

Parameters

originalData Original data

Returns: Array of complex numbers representing this data

static Complex [][][] utils.FftOperations.transform ( double originalData[][][] )

static

Transform a 3D array of real numbers into an array of complex numbers.

Transform a 3D array of real numbers into an array of complex numbers

Parameters

originalData Original data

Returns: Array of complex numbers representing this data

static Complex [] utils.FftOperations.transform ( Complex[] originalData )

static

Transform a 1D array of Complex numbers into an array of complex numbers.

Transform a 1D array of Complex numbers into an array of complex numbers

Parameters

originalData Original data

Returns: Array of complex numbers representing this data

static Complex [][] utils.FftOperations.transform ( Complex originalData[][] )

static

Transform a 2D array of Complex numbers into an array of complex numbers.

Transform a 2D array of Complex numbers into an array of complex numbers

Parameters

originalData Original data

Returns: Array of complex numbers representing this data

static Complex [][][] utils.FftOperations.transform ( Complex originalData[][][] )

static

Transform a 3D array of Complex numbers into an array of complex numbers.

Transform a 3D array of Complex numbers into an array of complex numbers

Parameters

originalData Original data

Returns: Array of complex numbers representing this data

The documentation for this class was generated from the following file:

/home/kieran/Dropbox/workspace/iDynoMiCS/src/utils/FftOperations.java

Static Public Member Functions

Detailed Description

Member Function Documentation