Mathematics

Function Summary

MATLAB provides a collection of functions for computing and working with Fourier transforms.

FFT Function Summary  

Function	Description
fft	Discrete Fourier transform.
fft2	Two-dimensional discrete Fourier transform.
fftn	N-dimensional discrete Fourier transform.
ifft	Inverse discrete Fourier transform.
ifft2	Two-dimensional inverse discrete Fourier transform.
ifftn	N-dimensional inverse discrete Fourier transform.
abs	Magnitude.
angle	Phase angle.
unwrap	Unwrap phase angle in radians.
fftshift	Move zeroth lag to center of spectrum.
cplxpair	Sort numbers into complex conjugate pairs.
nextpow2	Next higher power of two.

Fourier Analysis and the Fast Fourier Transform (FFT)

Introduction