everyutil/number/medianAbsoluteDeviation.js

A comprehensive library of lightweight, reusable utility functions for JavaScript and TypeScript, designed to streamline common programming tasks such as string manipulation, array processing, date handling, and more.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.medianAbsoluteDeviation = void 0;
/**
 * Calculates the Median Absolute Deviation (MAD) of an array of numbers.
 * @author @dailker
 * @param {number[]} numbers - The input array of numbers.
 * @returns {number} The median absolute deviation.
 */
function medianAbsoluteDeviation(numbers) {
    const median = (arr) => {
        const s = arr.slice().sort((a, b) => a - b);
        const mid = Math.floor(s.length / 2);
        return s.length % 2 ? s[mid] : (s[mid - 1] + s[mid]) / 2;
    };
    const med = median(numbers);
    return median(numbers.map(n => Math.abs(n - med)));
}
exports.medianAbsoluteDeviation = medianAbsoluteDeviation;