ts-prime/dist/es/stats.js

A utility library for JavaScript and Typescript.

var __spreadArrays = (this && this.__spreadArrays) || function () {
    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;
    for (var r = Array(s), k = 0, i = 0; i < il; i++)
        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)
            r[k] = a[j];
    return r;
};
import { purry } from './purry';
function _stats(data, fn) {
    var dfFn = function (data) {
        return data;
    };
    var numbers = data.map(fn || dfFn);
    function calcMedian(values) {
        if (values.length === 0)
            return 0;
        __spreadArrays(values).sort(function (a, b) {
            return a - b;
        });
        var half = Math.floor(values.length / 2);
        if (values.length % 2)
            return values[half];
        return (values[half - 1] + values[half]) / 2.0;
    }
    var min = Math.min.apply(Math, numbers);
    var max = Math.max.apply(Math, numbers);
    var sum = numbers.reduce(function (acc, c) { return acc + c; }, 0);
    return {
        sum: sum,
        middle: (max + min) / 2,
        min: Math.min.apply(Math, numbers),
        max: Math.max.apply(Math, numbers),
        arithmetic_mean: sum / numbers.length,
        geometric_mean: numbers.reduce(function (acc, c) { return acc * (c === 0 ? 1 : c); }, 1) / numbers.length,
        median: calcMedian(numbers),
        quadratic_mean: Math.sqrt(numbers.map(function (q) { return Math.pow(q, 2); }).reduce(function (acc, c) { return acc + c; }, 0)),
    };
}
export function stats() {
    return purry(_stats, arguments);
}