time-to-botec/squiggle/node_modules/@stdlib/math/base/special/sinc/README.md

sinc

Compute the cardinal sine of a number.

The normalized cardinal sine function is defined as

for any real number x.

Usage

var sinc = require( '@stdlib/math/base/special/sinc' );

sinc( x )

Computes the normalized cardinal sine of a number.

var v = sinc( 0.5 );
// returns ~0.637

v = sinc( -1.2 );
// returns ~-0.156

v = sinc( 0.0 );
// returns 1.0

v = sinc( NaN );
// returns NaN

Examples

var linspace = require( '@stdlib/array/linspace' );
var sinc = require( '@stdlib/math/base/special/sinc' );

var x = linspace( -5.0, 5.0, 100 );
var i;

for ( i = 0; i < x.length; i++ ) {
    console.log( sinc( x[ i ] ) );
}