MRI field-shift calculation with virtual Zero-Padding by Job

Efficient forward Fourier-based calculation of the susceptibility-induced field shift in MRI (mri, magnetic susceptibili..., aliasing)

FBFC_CC_no_padding(X_dev)

FBFC_CC_vZP(X_dev, degree)

FBFC_KF_vZP(X_dev, degree)

3D convolution in the FFT domain by Christopher Coello

Achieve a 3D convolution in the fourrier domain. (convolution, fourier, 3d)

convolution3D_FFTdomain(inVol,inKer)

Fourier Coefficient Conversion by Sebastian W

Converts Fourier Coefficients from exponential to cos/sin and the other way around. (fourier, transform, coefficient)

FOURIERcossin2exp(a, b)

FOURIERexp2cossin(c)

finite fourier series by Alok D

finite fourier series (fourier)

finite_fourier_series.m

Live audio stream analyser and voice coach by Steve Lawrence

A program that uses 'analoginput' to create a live audio stream, which is analyzed in real-time. (singing, coach, signal processing)

liveon.m

dft.m by Shubhi Rani

computes 1-D fourier transform (dft, matlab, simulation)

dft.m

Ecuaciones Diferenciales y de Diferencias by Roberto Herrera

Solución de ecuaciones diferenciales en forma simbólica y de diferencias en gráfica y simbólica (mathematics, fourier, dirac)

ecuadiferedydiferen.m

Signals and Systems Laboratory with MATLAB M-files by Alex Palamides

These are most of the m-files contained in the book Signals and Systems Laboratory with MATLAB (bode, state space, laplace)

[sm,pro]=oper(A,B)

convd(x,n1,h,n2)

det1(A)

1D Fourier shift by Tim

Shift 1D signals using the Fourier shift theorem. (signal processing, fourier, shift)

FourierShift(x, delta, zero_pad)

2D Fourier shift by Tim

Cyclically shift a 2D matrix or image using the Fourier shift theorem. (image, shift, fourier)

FourierShift2D(x, delta)

FFT filter - clean your signals and display results! by Shmuel Ben-Ezra

Perform Fourier transform, filter in frequency domain, reconstruct the signal. (filter, dft, data analysis)

fftf(t, x, varargin)

MGWT by Jesús P. Mena-Chalco

Identification of protein coding regions using the Modified Gabor-wavelet transform. (protein coding region, gene, identification)

MGWT(varargin)

Three Dimensional Analytical Magnetic Resonance Imaging Phantom in the Fourier Domain by Cheng Guan Koay

This software contains 2D and 3D Shepp-Logan phantoms in both the image and Fourier domains. (image generation, shepplogan 3d analyti..., shepplogan 3d analyti...)

SampleTest.m.m

fseriedemo by Matt Fig

Calculates and plots the Fourier Series Approximation to function f. (demo, plot, series)

fseriesdemo(f,b,NN)

HarmonicSeries.m by Carlos Adrian Vargas Aguilera

Space-Time series (1D, 2D, or 3D) as the sum of cosines. (spectral analysis, harmonic, cosine)

harmonicseries(AMP,PER,PHA,LEN,DIR,T,X,Y)

Sawtooth Wave Fourier Series Demo by Kanchi

Sawtooth Wave Fourier Series Demo (sawtooth, spectral analysis, fourier)

sawtooth_wave_fourier_series_demo

Square Wave Fourier Series Demo by Kanchi

Square Wave Fourier Series Demo (fourier, demo, spectral analysis)

square_wave_fourier_series_demo

Elliptical Fourier Shape Descriptors GUI by David Thomas

Provides a GUI for the EFSD routines by the same author (measurements, fourier, shape analysis)

fsdv221(varargin)

Calculate Wigner distribution by Adam Wyatt

Calculates the 2D Wigner distribution of a complex function. (wigner function distr..., 2d, chemistry)

mywigner(Ex)

Split Step Fourier Method by Muddassir Iqbal

Simulate Pulse propagation in Fiber optics (so nice, pulse propagation, fourier)

split_step_fourier_method.m

Interactive Fourier Filter (version 1.5) by Tom O'Haver

Interactive Fourier Filter for time-series signals. (filter design, filter analysis, filter)

exp(-((x-pos)./(0.6006.*wid)) .^(2*round(n)));

exp(-((x-pos)./(0.6006.*wid)) .^2);

iffcenter(n,h)

Sine and cosine integrals on non-uniform grid by Leonid

Calculates integrals f(x)*sin(k*x)*dx and f(x)*cos(k*x)*dx with high precision for any value of k (integration, sine, cosine)

Int=integral_cos(x, f, k)

Int=integral_simpson(x, f)

Int=integral_sin(x, f, k)

Fast Fourier Transform Algorithm by Farhat Masood

Implementation of FFT without using matlab built-in function of fft. (algorithm, fft, open source)

Y=ft2

FourierTransform2.m by Carlos Adrian Vargas Aguilera

Fourier complex transform of a 2D real field. (fftshift, ifft, spectrum)

fouriertransform2(z,varargin)

InverseFourierTransform2.m by Carlos Adrian Vargas Aguilera

Inverse Fourier complex transform of a origin-symetrical complex transform (result 2D real field). (spectral analysis, fourier, spectrum)

inversefouriertransform2(Cz,varargin)

fshift by Francois Bouffard

Shifts the elements of an array by a (possibly non-integer) given number of elements. (fractional, utilities, shift)

fshift(x,s)

Singular Fourier-Pade approximation by Toby Driscoll

Circumvention of the Gibbs phenonmenon though Pade approximations with singularities (approximation, interpolation, fourier)

padelog(c,z0)

Fast Fourier Transform by erinc topdemir

An fft algorithm using radix2. (dsp, fft, fourier)

x=my_fft(y,m)

Fourier-Motzkin Elimination by Sebastian Siegel

Fourier-Motzkin Elimination of a systen of inequalities (A*x <= b). (fourniermotzkin elimi..., elimination, motzkin)

fourmotz(A,b,nvar);

reduce_rows(a);

ORTHPOLYFIT, ORTHPOLYVAL by Ingo Löhken

Direct transform of multivariate series to a polynomial domain by the Gaussian quadrature methods. (approximation, interpolation, orthogonal)

fsa by M MA

Fourier Spectral Analysis (fourier, fsa, spectral analysis)

fsa(x,interval,output,fopen_opt)

Find centroid of a monochrome laserspot within a dark background by Rainer F.

Find centroid of a monochrome laserspot within a dark background using Fourier. (centroid, fourier, image analysis)

FindCentroidLaserSpotUsingFourier(shot)

test.m

Fourier Series Surface Fitter (FSSF2) by Miltiades Salvanos

gui tool to fit Fourier series surfaces over scatter data. (approximation, interpolation, fourier)

A=fitfourier(data,n,bcx_0,bcx_end,bcy_0,bcy_end)

fssf(varargin)

output=kernel(data,n,series,bcx_0,bcx_end,bcy_0,bcy_end)

fftd.m by Paul Godfrey

A dimensionless Discrete Fourier Transform program. (spectral analysis, discrete, fourier)

fftd(t)

fftd by Paul Godfrey

Computes the dimensionless fft. (spectral analysis, fft, fourier)

fftd(t)

fourier_simple.m by ahmed marmoush

Plot Fourier series. (specialized, plotting, fourier)

fourier_simple.m

ShiftImage by Edward Brian Welch

Shifts an image using the Fourier shift theorem. (shift, approximation, image)

RotateImage(Image, deltax, deltay)

FFT Plot by Bill Higley

A quick-and-dirty FFT Plot (plot, fft, specialized)

fftplot(in)

RotateImage by Edward Brian Welch

Image rotation performed by 3 separable skews (geometric transformat..., image registration, rotate)

RotateImage(Image, degrees)

FFT of a 256x256 Matrix by Mark Limber

FFT of a 256x256 Matrix (gallery, fft, 256x256)

fourier_by_jump.m by Rasmus Post

FOURIER_BY_JUMP is a fourier analysis, especially made for sampled data, but it is not a DFT. (spectral analysis, fourier, sampled data)

[a_0,a_n,b_n]=f(input,max_harmonic,method);

ffth.m by Paul Godfrey

Half space FFT (spectral analysis, fast, fourier)

ffth(T)

fftmspec.m by Jesus Rojas Zavarce

Module Spectra of the Fourier Transform (spectral analysis, module, spectra)

fftmspec(xt,t)

fourgraph by Yaniv Hollander

Hemo of ploting a fourier series to a given one variable function. (spectral analysis, fourier, plotting)

draw(func,i,h,dx,Xmin,Xmax);

fourgraph()