absgammalnf

Natural logarithm of the absolute value of the gamma function.

Installation

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

Usage

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

absgammalnf( x )

Evaluates the natural logarithm of the absolute value of the gamma function.

var v = absgammalnf( 2.0 );
// returns 0.0

v = absgammalnf( 1.0 );
// returns 0.0

v = absgammalnf( 4.0 );
// returns ~1.792

v = absgammalnf( -0.5 );
// returns ~1.266

v = absgammalnf( 0.5 );
// returns ~0.572

v = absgammalnf( 0.0 );
// returns Infinity

v = absgammalnf( NaN );
// returns NaN

Examples

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

var opts = {
    'dtype': 'float32'
};
var x = uniform( 100, -10.0, 10.0, opts );

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

C APIs

Usage

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

stdlib_base_absgammalnf( x )

Evaluates the natural logarithm of the absolute value of the gamma function.

float out = stdlib_base_absgammalnf( 2.0f );
// returns 0.0f

out = stdlib_base_absgammalnf( 4.0f );
// returns ~1.792f

The function accepts the following arguments:

• x: [in] float input value.

float stdlib_base_absgammalnf( const float x );

Examples

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

int main( void ) {
    const float x[] = { 4.0f, -1.5f, -0.5f, 0.5f };

    float y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        y = stdlib_base_absgammalnf( x[ i ] );
        printf( "absgammalnf(%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.

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Copyright

Copyright © 2016-2026. The Stdlib Authors.