@stdlib/constants-float64-cbrt-eps

Cube root of double-precision floating-point epsilon.

Usage no npm install needed!

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README

Cube Root of Epsilon

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Cube root of double-precision floating-point epsilon.

Installation

npm install @stdlib/constants-float64-cbrt-eps

Usage

var FLOAT64_CBRT_EPSILON = require( '@stdlib/constants-float64-cbrt-eps' );

FLOAT64_CBRT_EPSILON

Cube root of double-precision floating-point epsilon.

var bool = ( FLOAT64_CBRT_EPSILON === 0.0000060554544523933395 );
// returns true

Examples

var abs = require( '@stdlib/math-base-special-abs' );
var max = require( '@stdlib/math-base-special-max' );
var randu = require( '@stdlib/random-base-randu' );
var FLOAT64_CBRT_EPSILON = require( '@stdlib/constants-float64-cbrt-eps' );

var bool;
var a;
var b;
var i;

function isApprox( a, b ) {
    var delta;
    var tol;

    delta = abs( a - b );
    tol = FLOAT64_CBRT_EPSILON * max( abs( a ), abs( b ) );

    return ( delta <= tol );
}

for ( i = 0; i < 100; i++ ) {
    a = randu() * 10.0;
    b = a + (randu()*5.0e-7) - 2.5e-7;
    bool = isApprox( a, b );
    console.log( '%d %s approximately equal to %d. Delta: %d.', a, ( bool ) ? 'is' : 'is not', b, abs( a - b ) );
}

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.