1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/**
* @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.
*/
/* This is a generated file. Do not edit directly. */
'use strict';
// MAIN //
/**
* Evaluates a rational function, i.e., the ratio of two polynomials described by the coefficients stored in \\(P\\) and \\(Q\\).
*
* ## Notes
*
* - Coefficients should be sorted in ascending degree.
* - 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 rational function
* @returns {number} evaluated rational function
*/
function evalrational( x ) {
var ax;
var s1;
var s2;
if ( x === 0.0 ) {
return 0.04906224540690395;
}
if ( x < 0.0 ) {
ax = -x;
} else {
ax = x;
}
if ( ax <= 1.0 ) {
s1 = 0.04906224540690395 + (x * (-0.09691175301595212 + (x * (-0.4149833583594954 + (x * (-0.4065671242119384 + (x * (-0.1584135863906922 + (x * (-0.024014982064857155 + (x * -0.0010034668769627955))))))))))); // eslint-disable-line max-len
s2 = 1.0 + (x * (3.0234982984646304 + (x * (3.4873958536072385 + (x * (1.9141558827442668 + (x * (0.5071377386143635 + (x * (0.05770397226904519 + (x * 0.001957681026011072))))))))))); // eslint-disable-line max-len
} else {
x = 1.0 / x;
s1 = -0.0010034668769627955 + (x * (-0.024014982064857155 + (x * (-0.1584135863906922 + (x * (-0.4065671242119384 + (x * (-0.4149833583594954 + (x * (-0.09691175301595212 + (x * 0.04906224540690395))))))))))); // eslint-disable-line max-len
s2 = 0.001957681026011072 + (x * (0.05770397226904519 + (x * (0.5071377386143635 + (x * (1.9141558827442668 + (x * (3.4873958536072385 + (x * (3.0234982984646304 + (x * 1.0))))))))))); // eslint-disable-line max-len
}
return s1 / s2;
}
// EXPORTS //
module.exports = evalrational;
|
