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+ < span class ="cline-any cline-yes "> 3x</ span >
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+ < span class ="cline-any cline-neutral "> </ span > </ td > < td class ="text "> < pre class ="prettyprint lang-js "> /**
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+ * @license Apache-2.0
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+ *
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+ * Copyright (c) 2018 The Stdlib Authors.
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+ *
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+ * Licensed under the Apache License, Version 2.0 (the "License");
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+ * you may not use this file except in compliance with the License.
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+ * You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+
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+ 'use strict';
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+
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+ // MODULES //
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+
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+ var constantFunction = require( '@stdlib/utils/constant-function' );
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+ var isnan = require( '@stdlib/math/base/assert/is-nan' );
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+ var sqrt = require( '@stdlib/math/base/special/sqrt' );
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+
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+
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+ // MAIN //
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+
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+ /**
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+ * Returns a function for evaluating the quantile function for a triangular distribution with lower limit `a`, upper limit `b` and mode `c`.
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+ *
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+ * @param {number} a - lower limit
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+ * @param {number} b - upper limit
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+ * @param {number} c - mode
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+ * @returns {Function} quantile function
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+ *
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+ * @example
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+ * var quantile = factory( 2.0, 4.0, 2.5 );
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+ * var y = quantile( 0.4 );
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+ * // returns ~2.658
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+ *
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+ * y = quantile( 0.8 );
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+ * // returns ~3.225
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+ */
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+ function factory( a, b, c ) {
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+ var pInflection;
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+ var fact1;
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+ var fact2;
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+
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+ if (
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+ isnan( a ) ||
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+ isnan( b ) ||
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+ isnan( c ) ||
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+ a > c ||
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+ c > b
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+ ) {
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+ return constantFunction( NaN );
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+ }
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+
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+ pInflection = ( c - a ) / ( b - a );
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+ fact1 = ( b - a ) * ( c - a);
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+ fact2 = ( b - a ) * ( b - c );
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+ return quantile;
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+
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+ /**
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+ * Evaluates the quantile function for a triangular distribution.
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+ *
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+ * @private
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+ * @param {Probability} p - input value
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+ * @returns {number} evaluated quantile function
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+ *
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+ * @example
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+ * var y = quantile( 0.3 );
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+ * // returns <number>
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+ */
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+ function quantile( p ) {
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+ if ( isnan( p ) || p < 0.0 || p > 1.0 ) {
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+ return NaN;
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+ }
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+ if ( p < pInflection ) {
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+ return a + sqrt( fact1 * p );
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+ }
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+ if ( p > pInflection ) {
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+ return b - sqrt( fact2 * ( 1.0 - p ) );
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+ }
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+ // Case: p = pInflection
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+ return c;
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+ }
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+ }
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+
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+
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+ // EXPORTS //
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+
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+ module.exports = factory;
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+ </ pre > </ td > </ tr > </ table > </ pre >
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+
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+ < div class ='push '> </ div > <!-- for sticky footer -->
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+ </ div > <!-- /wrapper -->
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+ < div class ='footer quiet pad2 space-top1 center small '>
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+ Code coverage generated by
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+ < a href ="https://istanbul.js.org/ " target ="_blank " rel ="noopener noreferrer "> istanbul</ a >
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+ at 2025-03-07T03:21:25.612Z
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+ </ div >
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+ < script src ="../../../../../../prettify.js "> </ script >
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+ < script >
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+ window . onload = function ( ) {
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+ prettyPrint ( ) ;
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+ } ;
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+ </ script >
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+ < script src ="../../../../../../sorter.js "> </ script >
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+ < script src ="../../../../../../block-navigation.js "> </ script >
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+ </ body >
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+ </ html >
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+
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