#region License Information
/* HeuristicLab
* Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
*
* This file is part of HeuristicLab.
*
* HeuristicLab is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* HeuristicLab 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with HeuristicLab. If not, see .
*/
#endregion
using System;
using System.Collections.Generic;
using System.Linq;
namespace HeuristicLab.Algorithms.DataAnalysis {
public static class Util {
public static double ScalarProd(IEnumerable v, IEnumerable u) {
return v.Zip(u, (vi, ui) => vi * ui).Sum();
}
public static double SqrDist(double x, double y) {
double d = x - y;
return Math.Max(d * d, 0.0);
}
public static double SqrDist(IEnumerable x, IEnumerable y) {
return x.Zip(y, SqrDist).Sum();
}
public static IEnumerable GetRow(double[,] x, int r) {
int cols = x.GetLength(1);
return Enumerable.Range(0, cols).Select(c => x[r, c]);
}
public static IEnumerable GetCol(double[,] x, int c) {
int rows = x.GetLength(0);
return Enumerable.Range(0, rows).Select(r => x[r, c]);
}
}
}