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Sensix
Wireless Sensor Network Middleware |
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/home/brennan/Software/sensix/source/C^4/sensix/sensing/Sigma.java
Go to the documentation of this file.00001 00010 /* 00011 * Copyright 2008. Los Alamos National Security, LLC. This material 00012 * was produced under U.S. Government contract DE-AC52-06NA25396 for 00013 * Los Alamos National Laboratory (LANL), which is operated by Los 00014 * Alamos National Security, LLC, for the Department of Energy. The 00015 * U.S. Government has rights to use, reproduce, and distribute this 00016 * software. NEITHER THE GOVERNMENT NOR LOS ALAMOS NATIONAL SECURITY, 00017 * LLC, MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LEGAL 00018 * LIABILITY FOR THE USE OF THIS SOFTWARE. If software is modified to 00019 * produce derivative works, such modified software should be clearly 00020 * marked, so as not to confuse it with the version available from LANL. 00021 * 00022 * Additionally, this program is free software; you can redistribute 00023 * it and/or modify it under the terms of the GNU General Public 00024 * License as published by the Free Software Foundation; version 2 of 00025 * the License. Accordingly, this program is distributed in the hope 00026 * it will be useful, but WITHOUT ANY WARRANTY; without even the 00027 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 00028 * PURPOSE. See the GNU General Public License for more details. 00029 * 00030 * You should have received a copy of the GNU General Public License 00031 * along with this program; if not, write to the Free Software 00032 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 00033 */ 00034 00035 package sensix.sensing; 00036 00037 import sensix.*; 00038 00039 00040 public class Sigma extends Aggregate 00041 { 00042 public Sigma(byte l, Collection[] c) { 00043 super("Sigma", l, c); 00044 } 00045 00046 public Sigma(Collection[] c) { 00047 super("Sigma", c); 00048 } 00049 00050 public Sigma(byte l, Collection[] c, int seq) { 00051 super("Sigma", l, c, seq); 00052 } 00053 00054 00055 public byte identifier() { 00056 return Sensix.SIGMA; 00057 } 00058 00059 protected Data getResult(int idx) { 00060 double avg = 0; 00061 double value = 0; 00062 Data[] res = collectors()[idx].results(); 00063 for (int i = 0; i < res.length; i++) { 00064 Data d = res[i]; 00065 if (SenseUtil.isIntegerData(d.discriminator())) 00066 avg += res[i].iresult(); 00067 else if (SenseUtil.isFloatingPointData(d.discriminator())) 00068 avg += res[i].fresult(); 00069 } 00070 avg /= res.length; 00071 for (int i = 0; i < res.length; i++) { 00072 Data d = res[i]; 00073 double dev = 0.0; 00074 if (SenseUtil.isIntegerData(d.discriminator())) 00075 dev = d.iresult() - avg; 00076 else if (SenseUtil.isFloatingPointData(d.discriminator())) 00077 dev = d.fresult() - avg; 00078 value += (dev * dev); 00079 } 00080 value /= (res.length - 1); 00081 value = Math.sqrt(value); 00082 00083 Data ret = new Data(); 00084 ret.fresult(value); 00085 return ret; 00086 } 00087 00088 public Data result() { 00089 return getResult(0); 00090 } 00091 00092 public Data[] results() { 00093 int num = collectors().length; 00094 Data[] array = new Data[num]; 00095 for (int i = 0; i < num; i++) 00096 array[i] = getResult(i); 00097 return array; 00098 } 00099 00100 public void results(Data[] data) {} 00101 }