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  • License Apache-2.0

Square root of double-precision floating-point epsilon.

Package Exports

  • @stdlib/constants-float64-sqrt-eps
  • @stdlib/constants-float64-sqrt-eps/lib/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@stdlib/constants-float64-sqrt-eps) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

SQRT_EPS

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Square root of double-precision floating-point epsilon.

Installation

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

Usage

var SQRT_EPS = require( '@stdlib/constants-float64-sqrt-eps' );

SQRT_EPS

Square root of double-precision floating-point epsilon.

var bool = ( SQRT_EPS === 0.14901161193847656e-7 );
// 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 SQRT_EPS = require( '@stdlib/constants-float64-sqrt-eps' );

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

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

    delta = abs( a - b );
    tol = SQRT_EPS * 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 ) );
}

C APIs

Usage

#include "stdlib/constants/float64/sqrt_eps.h"

STDLIB_CONSTANT_FLOAT64_SQRT_EPS

Macro for the square root of double-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.

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License

See LICENSE.

Copyright © 2016-2022. The Stdlib Authors.