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    fft-windowing-ts

    0.2.7 • Public • Published

    fft-windowing-ts is a node.js module that applies a windowing function to an array of data, making it ready to be FFT'd.

    This package is a fork of Richard Eoin richardeoin@gmail.com's package https://github.com/richardeoin/nodejs-fft-windowing

    This article by National Instruments gives a good introduction to why windowing functions are useful.

    Installation

    If you have npm installed, just run:

    yarn add fft-windowing
    

    Usage

    The Hann (Hanning) window is a good general-purpose window. You would use it like so:

    import { hann } from "fft-windowing-ts";
    
    const raw = [2, 2, 0, -2, -2, 0, 2, 2];
    
    const windowed = hann(raw);

    The resulting windowed variable is then ready to be fed through a Fast Fourier Transform. A good node.js module to use would be this one.

    The following windows are available:

    The following windows can also accept an extra parameter, alpha:

    You would use it like this:

    import windowing from "fft-windowing";
    
    const raw = [2, 2, 0, -2, -2, 0, 2, 2];
    
    const windowed = kaiser(raw, 0.5);

    Tests

    Run node tests/fft-windowing-tests.js. This should apply each windowing function to a uniform array.

    LICENSE

    MIT

    Install

    npm i fft-windowing-ts

    DownloadsWeekly Downloads

    40

    Version

    0.2.7

    License

    MIT

    Unpacked Size

    12.6 kB

    Total Files

    5

    Last publish

    Collaborators

    • khems