Java tutorial
//package com.java2s; /* Copyright 2008, CCTC - Computer Science and Technology Center IBB-DEB - Institute for Biotechnology and Bioengineering - Department of Biological Engineering University of Minho This is free software: you can redistribute it and/or modify it under the terms of the GNU Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This code is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Public License for more details. You should have received a copy of the GNU Public License along with this code. If not, see <http://www.gnu.org/licenses/>. Created inside the SysBio Research Group (http://sysbio.di.uminho.pt) University of Minho */ public class Main { public static double p_norm(double[] vals, int p) { double pnorm = 0.0; for (double d : vals) { pnorm += Math.pow(Math.abs(d), p); } return Math.pow(pnorm, (1.0d / (double) p)); } }