Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1232x 1232x 1232x 1232x 1232x 1232x 1232x 1232x 1232x 1232x 1232x 1232x 22176x 22176x 22176x 22176x 1232x 1232x 1232x 1x 1x 1x 1x 1x | /**
* @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';
// VARIABLES //
// Chebyshev polynomial coefficients...
var A = [
1.996379051590076518221,
-0.17971032528832887213e-2,
0.131292857963846713e-4,
-0.2340875228178749e-6,
0.72291210671127e-8,
-0.3280997607821e-9,
0.198750709010e-10,
-0.15092141830e-11,
0.1375340084e-12,
-0.145728923e-13,
0.17532367e-14,
-0.2351465e-15,
0.346551e-16,
-0.55471e-17,
0.9548e-18,
-0.1748e-18,
0.332e-19,
-0.58e-20
];
// MAIN //
/**
* Computes the sum of a Chebyshev polynomial.
*
* @private
* @param {PositiveInteger} n - degree of polynomial
* @param {number} t - input value
* @returns {number} Chebyshev sum
*/
function chepolsum( n, t ) {
var tt;
var u0;
var u1;
var u2;
var k;
u0 = 0.0;
u1 = 0.0;
tt = t + t;
k = n;
do {
u2 = u1;
u1 = u0;
u0 = ( tt*u1 ) - u2 + A[ k ];
k -= 1;
} while ( k >= 0 );
return ( u0-u2 ) / 2.0;
}
// EXPORTS //
module.exports = chepolsum;
|