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import mean from "./mean";
/** * The sum of deviations to the Nth power. * When n=2 it's the sum of squared deviations. * When n=3 it's the sum of cubed deviations. * * @param {Array<number>} x * @param {number} n power * @returns {number} sum of nth power deviations * * @example * var input = [1, 2, 3]; * // since the variance of a set is the mean squared * // deviations, we can calculate that with sumNthPowerDeviations: * sumNthPowerDeviations(input, 2) / input.length; */function sumNthPowerDeviations(x, n) {    const meanValue = mean(x);    let sum = 0;    let tempValue;    let i;
    // This is an optimization: when n is 2 (we're computing a number squared),    // multiplying the number by itself is significantly faster than using    // the Math.pow method.    if (n === 2) {        for (i = 0; i < x.length; i++) {            tempValue = x[i] - meanValue;            sum += tempValue * tempValue;        }    } else {        for (i = 0; i < x.length; i++) {            sum += Math.pow(x[i] - meanValue, n);        }    }
    return sum;}
export default sumNthPowerDeviations;