search_right.js (1193B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // MODULES // 22 23 var cdf = require( './../../../../../base/dists/binomial/cdf' ); 24 25 26 // MAIN // 27 28 /** 29 * Performs a search to the right. 30 * 31 * @private 32 * @param {NonNegativeInteger} x - starting guess 33 * @param {Probability} r - probability 34 * @param {NonNegativeInteger} n - number of trials 35 * @param {Probability} p - success probability 36 * @returns {NonNegativeInteger} `r` quantile of the specified distribution 37 */ 38 function searchRight( x, r, n, p ) { 39 x += 1; 40 while ( cdf( x, n, p ) < r ) { 41 x += 1; 42 } 43 return x; 44 } 45 46 47 // EXPORTS // 48 49 module.exports = searchRight;