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对所有阵列组件求和，然后上电n。
//来 自 nowjava.com - 时代Java //package com.nowjava; public class Main { public static void main(String[] argv) throws Exception { double[] data = new double[] { 34.45, 35.45, 36.67, 37.78, 37.0000, 37.1234, 67.2344, 68.34534, 69.87700 }; int n = 2; System.out.println(getPowerN(data, n)); } /** * Sums all components then puts to power n. * This is the direct computation of the polynomial expansion */ //also see MathUtils.polynomialExpansion() /** 来 自 NowJava.com **/ public static double getPowerN(double[] data, int n) { double ans = 0.0;