All files / stats/base/dists/binomial/quantile/lib search_left.js

100% Statements 48/48
100% Branches 4/4
100% Functions 1/1
100% Lines 48/48

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 493x 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 7288x 7288x 714x 714x 7288x 7288x 3x 3x 3x 3x 3x  
/**
* @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';
 
// MODULES //
 
var cdf = require( '@stdlib/stats/base/dists/binomial/cdf' );
 
 
// MAIN //
 
/**
* Performs a search to the left.
*
* @private
* @param {NonNegativeInteger} x - starting guess
* @param {Probability} r - probability
* @param {NonNegativeInteger} n - number of trials
* @param {Probability} p - success probability
* @returns {NonNegativeInteger} `r` quantile of the specified distribution
*/
function searchLeft( x, r, n, p ) {
	while ( x !== 0 && cdf( x-1, n, p) >= r ) {
		x -=1;
	}
	return x;
}
 
 
// EXPORTS //
 
module.exports = searchLeft;