将样本中的功率计算为所有样本绝对值的平方和。

//package com.nowjava;
//来自 N o w J a v a . c o m

public class Main {

    /**

     * Calculates the power in a sample as sum of the squares of the absolute values of all samples.

     * @param sample

     * @return

     */

    public static double getPower(double[] sample) {

        double power = 0;

        for (int i = 0; i < sample.length; i++) {

            power += Math.pow(Math.abs(sample[i]), 2);

        }

        return power;

    }

}