@stdlib/math-base-special-gamma1pm1/lib/index.js

Compute gamma(x+1) - 1.

/**
* @license Apache-2.0
*
* Copyright (c) 2018 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

'use strict';

/**
* Compute `gamma(x+1) - 1` without cancellation errors.
*
* @module @stdlib/math-base-special-gamma1pm1
*
* @example
* var gamma1pm1 = require( '@stdlib/math-base-special-gamma1pm1' );
*
* var v = gamma1pm1( 0.2 );
* // returns ~-0.082
*
* v = gamma1pm1( -5.3 );
* // returns ~-1.102
*
* v = gamma1pm1( 0.0 );
* // returns 0.0
*
* v = gamma1pm1( NaN );
* // returns NaN
*/

// MODULES //

var gamma1pm1 = require( './main.js' );


// EXPORTS //

module.exports = gamma1pm1;