sincf

Compute the cardinal sine of a single-precision floating-point number (in radians).

The normalized cardinal sine function is defined as

for any real number x.

Installation

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

Usage

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

sincf( x )

Computes the normalized cardinal sine of a single-precision floating-point number (in radians).

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

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

v = sincf( 0.0 );
// returns 1.0

v = sincf( NaN );
// returns NaN

Examples

var uniform = require( '@stdlib/random-array-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var sincf = require( '@stdlib/math-base-special-sincf' );

var opts = {
    'dtype': 'float32'
};
var x = uniform( 100, -5.0, 5.0, opts );

logEachMap( 'sincf( %0.4f ) = %0.4f', x, sincf );

C APIs

Usage

#include "stdlib/math/base/special/sincf.h"

stdlib_base_sincf( x )

Computes the normalized cardinal sine of a single-precision floating-point number (in radians).

float y = stdlib_base_sincf( 0.5f );
// returns ~0.637f

The function accepts the following arguments:

• x: [in] float input value.

float stdlib_base_sincf( const float x );

Examples

#include "stdlib/math/base/special/sincf.h"
#include <stdio.h>

int main( void ) {
    const float x[] = { 0.0f, 0.523f, 0.785f, 1.047f, 3.14f };

    float y;
    int i;
    for ( i = 0; i < 5; i++ ) {
        y = stdlib_base_sincf( x[ i ] );
        printf( "sincf(%f) = %f\n", x[ i ], y );
    }
}

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.

Community

License

See LICENSE.

Copyright

Copyright © 2016-2026. The Stdlib Authors.