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 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 1010x 1010x 1010x 1010x 1007x 1010x 6x 6x 1004x 1004x 1004x 1004x 1004x 1004x 1004x 1004x 1004x 1004x 1003x 1003x 1003x 1003x 1x 1x 1002x 1002x 1002x 1003x 431x 431x 1003x 402x 402x 169x 169x 169x 1003x 1010x 3x 3x 3x 3x 3x | /**
* @license Apache-2.0
*
* Copyright (c) 2026 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';
// MODULES //
var constantFunction = require( '@stdlib/utils/constant-function' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var sin = require( '@stdlib/math/base/special/sin' );
var PI = require( '@stdlib/constants/float64/pi' );
// VARIABLES //
var PI_OVER_4 = PI / 4.0;
// MAIN //
/**
* Returns a function for evaluating the cumulative distribution function (CDF) for an anglit distribution with location parameter `mu` and scale parameter `sigma` at a value `x`.
*
* @param {number} mu - location parameter
* @param {number} sigma - scale parameter
* @returns {Function} CDF
*
* @example
* var cdf = factory( 0.0, 1.0 );
* var y = cdf( 0.0 );
* // returns 0.5
*
* y = cdf( 2.0 );
* // returns 1.0
*/
function factory( mu, sigma ) {
if (
isnan( mu ) ||
isnan( sigma ) ||
sigma <= 0.0
) {
return constantFunction( NaN );
}
return cdf;
/**
* Evaluates the cumulative distribution function (CDF) for an anglit distribution.
*
* @private
* @param {number} x - input value
* @returns {Probability} evaluated CDF
*/
function cdf( x ) {
var y;
var s;
if ( isnan( x ) ) {
return NaN;
}
// Transform x to the standardized form
y = ( x - mu ) / sigma;
if ( y <= -PI_OVER_4 ) {
return 0.0;
}
if ( y >= PI_OVER_4 ) {
return 1.0;
}
s = sin( y + PI_OVER_4 );
return s * s;
}
}
// EXPORTS //
module.exports = factory;
|