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x/simplestatistics/src/mode.js

simple statistics for node & browser javascript
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import modeSorted from "./mode_sorted.js";import numericSort from "./numeric_sort.js";
/** * The [mode](https://en.wikipedia.org/wiki/Mode_%28statistics%29) is the number * that appears in a list the highest number of times. * There can be multiple modes in a list: in the event of a tie, this * algorithm will return the most recently seen mode. * * This is a [measure of central tendency](https://en.wikipedia.org/wiki/Central_tendency): * a method of finding a typical or central value of a set of numbers. * * This runs in `O(n log(n))` because it needs to sort the array internally * before running an `O(n)` search to find the mode. * * @param {Array<number>} x input * @returns {number} mode * @example * mode([0, 0, 1]); // => 0 */function mode(x) { // Sorting the array lets us iterate through it below and be sure // that every time we see a new number it's new and we'll never // see the same number twice return modeSorted(numericSort(x));}
export default mode;