// wink-statistics
// Fast and Numerically Stable Statistical Analysis Utilities.
//
// Copyright (C) GRAYPE Systems Private Limited
//
// This file is part of “wink-statistics”.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
// ## data
// Load percentile.
var percentile = require( './data-percentile.js' );
// ### median
/**
*
* Returns the median of the `sortedData`.
*
* @memberof data
* @param {array} sortedData sorted in ascending order of value.
* @param {(string|number|function)} [accessor=undefined] Useful when each element of
* `sortedData` is an object or an array instead of number. If it is an object
* then it should be the key (string) to access the value; or if it is an array
* then it should be the index (number) to access the value; or it should be a function
* that extracts the value from the element passed to it.
* @returns {number} median of the `sortedData`.
* @example
* median( [ 1, 1, 2, 2, 3, 3, 4, 4 ] );
* // returns 2.5
*/
var median = function ( sortedData, accessor ) {
return ( percentile( sortedData, 0.50, accessor ) );
}; // median()
module.exports = median;
