/*
* RapidMiner
*
* Copyright (C) 2001-2014 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.tools.math.smoothing;
/**
* This class implements the Epanechnikov smoothing kernel.
* @author Sebastian Land
*
*/
public class EpanechnikovSmoothingKernel extends SmoothingKernel {
private static final long serialVersionUID = -1270351361916359180L;
@Override
public double getWeight(double distance) {
if (distance < 1)
return 1 - distance * distance;
return 0;
}
@Override
public String toString() {
return "Epanechnikov Smoothing Kernel";
}
}