@stdlib/math-base-special-kernel-cos
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    0.0.6 • Public • Published

    Kernel Cosine

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    Compute the cosine of a number on [-π/4, π/4].

    Installation

    npm install @stdlib/math-base-special-kernel-cos

    Usage

    var kernelCos = require( '@stdlib/math-base-special-kernel-cos' );

    kernelCos( x, y )

    Computes the cosine of a number on [-π/4, π/4]. For increased accuracy, the number for which the cosine should be evaluated can be supplied as a double-double number (i.e., a non-evaluated sum of two double-precision floating-point numbers x and y).

    var v = kernelCos( 0.0, 0.0 );
    // returns ~1.0
    
    v = kernelCos( 3.141592653589793/6.0, 0.0 );
    // returns ~0.866
    
    v = kernelCos( 0.785, -1.144e-17 );
    // returns ~0.707
    
    v = kernelCos( NaN, 0.0 );
    // returns NaN

    Notes

    Examples

    var linspace = require( '@stdlib/array-linspace' );
    var PI = require( '@stdlib/constants-float64-pi' );
    var kernelCos = require( '@stdlib/math-base-special-kernel-cos' );
    
    var x = linspace( -PI/4.0, PI/4.0, 100 );
    var i;
    
    for ( i = 0; i < x.length; i++ ) {
        console.log( 'kernelCos(%d) = %d', x[ i ], kernelCos( x[ i ], 0.0 ) );
    }

    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-kernel-cos

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    4,295

    Version

    0.0.6

    License

    Apache-2.0

    Unpacked Size

    49.2 kB

    Total Files

    12

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