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/**
* Calculates sum of an array
* @param {array} arr array of numbers
* @returns {number} sum of numbers
*/
export function sum(arr) {
return arr.reduce((a, b) => a + b, 0);
}
* Calculates mean of an array
* @returns {number} mean
export function mean(arr) {
return sum(arr) / arr.length;
* Calculates standart deviation
* @returns {number} standart deviation
export function std(arr) {
const mu = mean(arr);
mu
const diffArr = arr.map(a => (a - mu) ** 2);
a
This check looks for parameters in functions that are not used in the function body and are not followed by other parameters which are used inside the function.
return Math.sqrt(sum(diffArr) / arr.length);
* Calculates quantiles
* @param {number} q quantile (0.25)
* @returns {number}
export function quantile(arr, q) {
const sorted = arr.sort((a, b) => a - b);
const pos = (sorted.length - 1) * q;
const base = Math.floor(pos);
const rest = pos - base;
if (sorted[base + 1] !== undefined) {
return sorted[base] + rest * (sorted[base + 1] - sorted[base]);
return sorted[base];
pustovitDmytro /
myrmidon
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