@stdlib/math-base-special-expit
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    0.0.5 • Public • Published

    expit

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    Compute the standard logistic function.

    The standard logistic function, also called the expit function, inverse logit, or sigmoid function, is defined as the logistic function with parameters (k = 1, x0 = 0, L = 1).

    Standard logistic function.

    Installation

    npm install @stdlib/math-base-special-expit

    Usage

    var expit = require( '@stdlib/math-base-special-expit' );

    expit( x )

    Computes the standard logistic function.

    var v = expit( 0.0 );
    // returns ~0.5
    
    v = expit( 1.0 );
    // returns ~0.731
    
    v = expit( -1.0 );
    // returns ~0.269
    
    v = expit( Infinity );
    // returns 1.0
    
    v = expit( NaN );
    // returns NaN

    Examples

    var randu = require( '@stdlib/random-base-randu' );
    var expit = require( '@stdlib/math-base-special-expit' );
    
    var x;
    var i;
    
    for ( i = 0; i < 100; i++ ) {
        x = randu();
        console.log( 'expit(%d) = %d', x, expit( x ) );
    }

    Notice

    This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

    For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

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    License

    See LICENSE.

    Copyright

    Copyright © 2016-2021. The Stdlib Authors.

    Install

    npm i @stdlib/math-base-special-expit

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    29

    Version

    0.0.5

    License

    Apache-2.0

    Unpacked Size

    47.6 kB

    Total Files

    10

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser