fftfreq - get exact Matlab FFT frequencies

Version 1.0.2 (1.91 KB) by Kristupas Tikuišis
Calculate FFT frequencies of the amplitudes calculated with the FFT
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Updated 13 Apr 2023

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Calculates the exact Fourier frequencies for spectra calculated via FFT. This functionality is not provided by Matlab, hence requires custom function. Currently only works on vectors/1D arrays.
It is not straightforward due to how the operation is done on a bit-level. The first coefficient is 0 Hz (the DC component) but higher negative and positive frequencies are ordered in a specific way, separated at the Nyquist frequency (also optionally returned by the function).

Cite As

Kristupas Tikuišis (2024). fftfreq - get exact Matlab FFT frequencies (https://www.mathworks.com/matlabcentral/fileexchange/113240-fftfreq-get-exact-matlab-fft-frequencies), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2020a
Compatible with any release
Platform Compatibility
Windows macOS Linux

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Version Published Release Notes
1.0.2

Only the description updated
1.0.1

Updated description
1.0.0