| MATLAB® | |
MATLAB® functions related to Fourier transforms include:
| Function | Description |
|---|---|
| fft | One-dimensional fast Fourier transform |
| ifft | One-dimensional inverse fast Fourier transform |
| fft2 | Two-dimensional fast Fourier transform |
| ifft2 | Two-dimensional inverse fast Fourier transform |
| fftn | N-dimensional fast Fourier transform |
| ifftn | N-dimensional inverse fast Fourier transform |
| fftshift | Rearrange DFT data to center zero-frequency component |
| fftw | Interface to FFTW run-time algorithm |
| abs | Amplitude of the DFT |
| angle | Phase of the DFT |
| unwrap | Correct phase angles with jumps greater than or equal to pi |
| nextpow2 | Next power of two greater than or equal to a given length |
| pow2 | Compute powers of two |
The MATLAB software also includes demos that use these functions in combination for Fourier analysis:
FFT for Spectral Analysis — Reviews basic spectral analysis with the FFT
Using FFT in MATLAB — Example of time series analysis with the FFT that looks for periodicity in historical data on sunspot activity
| Fast Fourier Transform (FFT) | Examples | |
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