/*
* RomRaider Open-Source Tuning, Logging and Reflashing
* Copyright (C) 2006-2012 RomRaider.com
*
* This program 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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package com.romraider.logger.ecu.ui.tab;
import static com.romraider.util.ParamChecker.checkNotNull;
import jamlab.Polyfit;
import jamlab.Polyval;
import org.jfree.data.xy.AbstractXYDataset;
import org.jfree.data.xy.XYDataItem;
import org.jfree.data.xy.XYSeries;
import java.lang.reflect.UndeclaredThrowableException;
import java.util.ArrayList;
import java.util.List;
public final class XYTrendline extends AbstractXYDataset {
private static final long serialVersionUID = 1375705537694372443L;
private List<XYDataItem> items = new ArrayList<XYDataItem>();
private double[] xVals = new double[0];
private double[] yPoly = new double[0];
private final XYSeries series;
private Polyfit polyfit;
public XYTrendline(XYSeries series) {
checkNotNull(series);
this.series = series;
}
public int getSeriesCount() {
return 1;
}
public Comparable<String> getSeriesKey(int seriesIndex) {
return "foo";
}
public synchronized int getItemCount(int seriesIndex) {
return yPoly.length;
}
public synchronized Number getY(int seriesIndex, int item) {
return yPoly[item];
}
public synchronized Number getX(int seriesIndex, int item) {
return xVals[item];
}
public synchronized void update(int order) {
if (series.getItemCount() <= order) return;
items = new ArrayList<XYDataItem>(series.getItems());
xVals = new double[items.size()];
double[] yVals = new double[items.size()];
for (int i = 0; i < items.size(); i++) {
XYDataItem dataItem = items.get(i);
xVals[i] = dataItem.getX().doubleValue();
yVals[i] = dataItem.getY().doubleValue();
}
try {
polyfit = new Polyfit(xVals, yVals, order);
yPoly = calculate(xVals);
} catch (Exception e) {
throw new UndeclaredThrowableException(e);
}
}
public synchronized double[] calculate(double[] x) {
if (polyfit == null) throw new IllegalStateException("Interpolation required");
Polyval polyval = new Polyval(x, polyfit);
return polyval.getYout();
}
public synchronized Polyfit getPolyFit() {
if (polyfit == null) throw new IllegalStateException("Interpolation required");
return polyfit;
}
public synchronized void clear() {
items.clear();
xVals = new double[0];
yPoly = new double[0];
polyfit = null;
}
}