@stdlib/math-base-special-gammainc/lib/polyval_c0.js

Incomplete gamma function.

/**
* @license Apache-2.0
*
* Copyright (c) 2022 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.
*/

/* This is a generated file. Do not edit directly. */
'use strict';

// MAIN //

/**
* Evaluates a polynomial.
*
* ## Notes
*
* -   The implementation uses [Horner's rule][horners-method] for efficient computation.
*
* [horners-method]: https://en.wikipedia.org/wiki/Horner%27s_method
*
* @private
* @param {number} x - value at which to evaluate the polynomial
* @returns {number} evaluated polynomial
*/
function evalpoly( x ) {
	if ( x === 0.0 ) {
		return -0.3333333333333333;
	}
	return -0.3333333333333333 + (x * (0.08333333333333333 + (x * (-0.014814814814814815 + (x * (0.0011574074074074073 + (x * (0.0003527336860670194 + (x * (-0.0001787551440329218 + (x * (0.00003919263178522438 + (x * (-0.0000021854485106799924 + (x * (-0.00000185406221071516 + (x * (8.296711340953087e-7 + (x * (-1.7665952736826078e-7 + (x * (6.707853543401498e-9 + (x * (1.0261809784240309e-8 + (x * (-4.382036018453353e-9 + (x * 9.14769958223679e-10))))))))))))))))))))))))))); // eslint-disable-line max-len
}


// EXPORTS //

module.exports = evalpoly;