@stdlib/math-base-special-besselj0 NPM

j0

$NPM version$ $Build Status$ $Coverage Status$

Compute the Bessel function of the first kind of order zero.

The Bessel function of the first kind of order zero is defined as

Installation

npm install @stdlib/math-base-special-besselj0

Usage

var j0 = require( '@stdlib/math-base-special-besselj0' );

j0( x )

Computes the Bessel function of the first kind of order zero at x.

var v = j0( 0.0 );
// returns 1.0

v = j0( 1.0 );
// returns ~0.765

v = j0( Infinity );
// returns 0.0

v = j0( -Infinity );
// returns 0.0

v = j0( NaN );
// returns NaN

Examples

var randu = require( '@stdlib/random-base-randu' );
var j0 = require( '@stdlib/math-base-special-besselj0' );

var x;
var i;

for ( i = 0; i < 100; i++ ) {
    x = randu() * 10.0;
    console.log( 'j0(%d) = %d', x, j0( x ) );
}

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.