/*
* Encog(tm) Workbench v3.0
* http://www.heatonresearch.com/encog/
* http://code.google.com/p/encog-java/
* Copyright 2008-2011 Heaton Research, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* For more information on Heaton Research copyrights, licenses
* and trademarks visit:
* http://www.heatonresearch.com/copyright
*/
package org.encog.workbench.dialogs.activation;
import java.awt.BasicStroke;
import java.awt.BorderLayout;
import javax.swing.JPanel;
import org.encog.engine.network.activation.ActivationFunction;
import org.encog.engine.network.activation.ActivationSigmoid;
import org.encog.workbench.util.graph.EncogChartPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.function.Function2D;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
public class EquationPanel extends JPanel {
private ChartPanel panel;
public EquationPanel()
{
this.setLayout(new BorderLayout());
setupEquation(new ActivationSigmoid(),true);
}
public void setupEquation(ActivationFunction activation, boolean normal)
{
JFreeChart chart = createChart(createDataset(activation, normal),activation,normal);
if( this.panel==null)
{
this.panel = new EncogChartPanel(chart);
panel.setMouseWheelEnabled(true);
this.add(panel,BorderLayout.CENTER);
}
else
{
this.panel.setChart(chart);
}
}
/**
* Creates a dataset with sample values from the normal distribution
* function.
*
* @return A dataset.
*/
public static XYDataset createDataset(ActivationFunction activation, boolean normal) {
XYSeriesCollection dataset = new XYSeriesCollection();
if( normal )
{
Function2D n1 = new ActivationFunction2D(activation);// //new NormalDistributionFunction2D(0.0, 1.0);
XYSeries s1 = DatasetUtilities.sampleFunction2DToSeries(n1, -5.1, 5.1,
121, "Activation Function");
dataset.addSeries(s1);
}
else
{
if( activation.hasDerivative())
{
Function2D n2 = new DerivativeFunction2D(activation);
XYSeries s2 = DatasetUtilities.sampleFunction2DToSeries(n2, -5.1, 5.1,
121, "Derivative Function");
dataset.addSeries(s2);
}
}
return dataset;
}
/**
* Creates a line chart using the data from the supplied dataset.
*
* @param dataset the dataset.
*
* @return The chart.
*/
public static JFreeChart createChart(XYDataset dataset, ActivationFunction activation, boolean normal) {
String title;
if( normal )
{
title = activation.getClass().getSimpleName();
}
else
{
if( activation.hasDerivative() )
{
title = "Derv of " + activation.getClass().getSimpleName();
}
else
{
title = "NO Derv of " + activation.getClass().getSimpleName();
}
}
JFreeChart chart = ChartFactory.createXYLineChart(
title,
"input (x)",
"output (y)",
dataset,
PlotOrientation.VERTICAL,
true,
true,
false
);
XYPlot plot = (XYPlot) chart.getPlot();
if(normal)
{
plot.setDomainZeroBaselineVisible(true);
plot.setRangeZeroBaselineVisible(true);
plot.setDomainPannable(true);
plot.setRangePannable(true);
ValueAxis xAxis = plot.getDomainAxis();
xAxis.setLowerMargin(0.0);
xAxis.setUpperMargin(0.0);
XYLineAndShapeRenderer r = (XYLineAndShapeRenderer) plot.getRenderer();
r.setDrawSeriesLineAsPath(true);
r.setSeriesStroke(0, new BasicStroke(1.5f));
r.setSeriesStroke(1, new BasicStroke(2.0f, BasicStroke.CAP_ROUND,
BasicStroke.JOIN_ROUND, 1.0f, new float[] { 6.0f, 4.0f },
0.0f));
r.setSeriesStroke(2, new BasicStroke(2.0f, BasicStroke.CAP_ROUND,
BasicStroke.JOIN_ROUND, 1.0f, new float[] { 6.0f, 4.0f, 3.0f,
3.0f }, 0.0f));
r.setSeriesStroke(3, new BasicStroke(2.0f, BasicStroke.CAP_ROUND,
BasicStroke.JOIN_ROUND, 1.0f, new float[] { 4.0f, 4.0f },
0.0f));
}
return chart;
}
}