/*
*
* This file is part of Aiphial.
*
* Copyright (c) 2010 Nicolay Mitropolsky <NicolayMitropolsky@gmail.com>
*
* This program 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 2 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package me.uits.aiphial.general.datagenerator;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import me.uits.aiphial.general.dataStore.NDimPoint;
import me.uits.aiphial.general.dataStore.SimpleNDimPoint;
/**
* N-dim points data generator based on multiple Gaussian distribution.
*
* @author Nicolay Mitropolsky <NicolayMitropolsky@gmail.com>
*/
public class DataGenerator {
private int deviation = 40;
private int dim = 5;
private int maxValue = 100;
private Random r = new Random();
private NDimPoint mapCenter;
public List<NDimPoint> generate(int centers, int totalPoints) {
if (mapCenter == null)
mapCenter = SimpleNDimPoint.getZeroPoint(dim);
List<NDimPoint> result = new ArrayList<NDimPoint>(totalPoints);
int pointsPerCenter = totalPoints / centers;
for (int i = 0; i < centers; i++) {
NDimPoint center = genCenter();
result.add(center);
for (int j = 0; j < pointsPerCenter; j++) {
result.add(genPoint(center));
}
}
return result;
}
private NDimPoint genPoint(NDimPoint center) {
Float[] data = new Float[dim];
for (int i = 0; i < dim; i++) {
data[i] = (float) (center.getCoord(i) + r.nextGaussian() * deviation);
}
return new SimpleNDimPoint(data);
}
private NDimPoint genCenter() {
Float[] data = new Float[dim];
for (int i = 0; i < data.length; i++) {
data[i] = mapCenter.getCoord(i) + (float) (r.nextDouble() * maxValue);
}
return new SimpleNDimPoint(data);
}
public DataGenerator() {
}
public DataGenerator(int dim) {
this.dim = dim;
}
public int getDim() {
return dim;
}
public void setDim(int dim) {
this.dim = dim;
}
public int getDeviation() {
return deviation;
}
public void setDeviation(int deviation) {
this.deviation = deviation;
}
public void setMaxValue(int maxValue) {
this.maxValue = maxValue;
}
public int getMaxValue() {
return maxValue;
}
public NDimPoint getMapCenter() {
return mapCenter;
}
public void setMapCenter(NDimPoint mapCenter) {
this.mapCenter = mapCenter;
}
}