@stdlib/constants-float32-cbrt-eps NPM

FLOAT32_CBRT_EPS

Cube root of single-precision floating-point epsilon.

Installation

npm install @stdlib/constants-float32-cbrt-eps

Usage

var FLOAT32_CBRT_EPS = require( '@stdlib/constants-float32-cbrt-eps' );

FLOAT32_CBRT_EPS

Cube root of single-precision floating-point epsilon.

var bool = ( FLOAT32_CBRT_EPS === 0.004921566694974899 );
// returns true

Examples

var abs = require( '@stdlib/math-base-special-abs' );
var max = require( '@stdlib/math-base-special-max' );
var float64ToFloat32 = require( '@stdlib/number-float64-base-to-float32' );
var randu = require( '@stdlib/random-base-randu' );
var FLOAT32_CBRT_EPS = require( '@stdlib/constants-float32-cbrt-eps' );

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

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

    delta = float64ToFloat32( abs( a - b ) );
    tol = float64ToFloat32( FLOAT32_CBRT_EPS * max( abs( a ), abs( b ) ) );

    return ( delta <= tol );
}

for ( i = 0; i < 100; i++ ) {
    a = float64ToFloat32( randu()*10.0 );
    b = float64ToFloat32( a + (randu()*0.02) - 0.01 );
    bool = isApprox( a, b );
    console.log( '%d %s approximately equal to %d', a, ( bool ) ? 'is' : 'is not', b );
}

C APIs

Usage

#include "stdlib/constants/float32/cbrt_eps.h"

STDLIB_CONSTANT_FLOAT32_CBRT_EPS

Macro for the cube root of single-precision floating-point epsilon.

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.