filter()

Signal Processing

filter() is a MATLAB®-compatible signal processing function for apply iir/fir digital filter (direct form ii). Run it online in your browser with SimLab — free, no install, no license required.

Apply IIR/FIR digital filter (direct form II).

▶ Try filter() in SimLab — Free

Syntax

filter(b, a, x)

Examples — run filter() in your browser

filter([0.1, 0.1], [1, -0.8], randn(100))

▶ Run

More Signal Processing Functions

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

fft()ifft()filtfilt()butter()spectrogram()

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Frequently Asked Questions about filter()

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

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

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

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

What does filter() do?

Apply IIR/FIR digital filter (direct form II). It is a MATLAB®-compatible signal processing function available in SimLab with the same calling syntax as MATLAB® — typically: filter(b, a, x).

Can I run filter() in my browser?

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

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