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/** * The Root Mean Square (RMS) is * a mean function used as a measure of the magnitude of a set * of numbers, regardless of their sign. * This is the square root of the mean of the squares of the * input numbers. * This runs in `O(n)`, linear time, with respect to the length of the array. * * @param {Array<number>} x a sample of one or more data points * @returns {number} root mean square * @throws {Error} if x is empty * @example * rootMeanSquare([-1, 1, -1, 1]); // => 1 */function rootMeanSquare(x) {    if (x.length === 0) {        throw new Error("rootMeanSquare requires at least one data point");    }
    let sumOfSquares = 0;    for (let i = 0; i < x.length; i++) {        sumOfSquares += Math.pow(x[i], 2);    }
    return Math.sqrt(sumOfSquares / x.length);}
export default rootMeanSquare;