fft()

Signal Processing

fft() is a MATLAB®-compatible signal processing function for fast fourier transform. converts a time-domain signal into its frequency-domain representation. returns an array of {re, im} complex values. use with linspace-generated signals for frequency analysis. Run it online in your browser with SimLab — free, no install, no license required.

▶ Try fft() in SimLab — Free

Syntax

fft(x)

fft(x, n)

Examples — run fft() in your browser

fft([1, 0, 1, 0])

▶ Run

fs = 100; t = linspace(0, 1, fs); x = sin(2*pi*10*t); X = fft(x)

▶ Run

More Signal Processing Functions

Browse other free, MATLAB®-compatible signal processing functions in SimLab:

ifft()filter()filtfilt()butter()spectrogram()

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Frequently Asked Questions about fft()

Is the fft() function free to use in SimLab?

Yes. SimLab is 100% free — no signup, no license, and no usage limits. You can run fft() and 510+ other MATLAB®-compatible functions directly in your browser at simulations4all.com/simlab.

Do I need to install MATLAB to use fft()?

No. SimLab runs entirely in your web browser with zero installation. The fft() function works without any MATLAB® license or software download.

What does fft() do?

Fast Fourier Transform. Converts a time-domain signal into its frequency-domain representation. Returns an array of {re, im} complex values. Use with linspace-generated signals for frequency analysis. It is a MATLAB®-compatible signal processing function available in SimLab with the same calling syntax as MATLAB® — typically: fft(x).

Can I run fft() in my browser?

Yes. Open SimLab at simulations4all.com/simlab, write or paste code that calls fft(), and run it. Execution happens locally in your browser — no data leaves your machine.

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