/**
* Copyright (C) 2010-2017 Gordon Fraser, Andrea Arcuri and EvoSuite
* contributors
*
* This file is part of EvoSuite.
*
* EvoSuite is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3.0 of the License, or
* (at your option) any later version.
*
* EvoSuite 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
* Lesser Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
*/
package ncs;
public class Variance
{
//assuming v.length>0
public double exe(int[] v)
{
//first calculate the mean
double sum = 0;
for(int i=0;i<v.length; i++)
sum += v[i];
double mean = sum/ (double)v.length;
double var = 0;
for(int i=0; i<v.length; i++)
{
double dif = v[i] - mean;
var += (dif*dif);
}
return var;
}
}