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    @stdlib/math-base-special-log1mexp
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    0.0.5 • Public • Published

    log1mexp

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    Evaluates the natural logarithm of 1-exp(-|x|).

    Installation

    npm install @stdlib/math-base-special-log1mexp

    Usage

    var log1mexp = require( '@stdlib/math-base-special-log1mexp' );

    log1mexp( x )

    Evaluates the natural logarithm of 1-exp(-|x|).

    var y = log1mexp( 0.0 );
    // returns -Infinity
    
    y = log1mexp( 5.0 );
    // returns ~-0.00676
    
    y = log1mexp( 10.0 );
    // returns ~-0.00005
    
    y = log1mexp( -10.0 );
    // returns ~-0.00005
    
    y = log1mexp( NaN );
    // returns NaN

    Examples

    var incrspace = require( '@stdlib/array-incrspace' );
    var log1mexp = require( '@stdlib/math-base-special-log1mexp' );
    
    var x = incrspace( -10.0, 10.0, 0.01 );
    var v;
    var i;
    
    for ( i = 0; i < x.length; i++ ) {
        v = log1mexp( x[ i ] );
        console.log( 'x: %d, f(x): %d', x[ i ], v );
    }

    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-log1mexp

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    18

    Version

    0.0.5

    License

    Apache-2.0

    Unpacked Size

    35.7 kB

    Total Files

    9

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser