locutus/esm/r/stats/sd.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

import { variance } from "./variance.js";
export function sd(x) {
    //      discuss at: https://locutus.io/r/sd/
    // parity verified: R 4.4
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Returns the sample standard deviation for a plain numeric vector.
    //       example 1: sd([1, 2, 3])
    //       returns 1: 1
    //       example 2: sd([1, 2, 3, 4])
    //       returns 2: 1.2909944487358056
    //       example 3: sd([2, 4, 6])
    //       returns 3: 2
    return Math.sqrt(variance(x));
}