ejemplos - graficar funciones en java jfreechart

Cómo establecer la misma escala para dominios y ejes de rango JFreeChart

Question

Me gustaría crear una gráfica de polo / cero similar a la gráfica de polo / cero . Es para mostrar propiedades de filtros IIR y FIR como estabilidad, tipo ...

Mi pregunta es: ¿cómo puedo establecer la misma escala (no rango) para ambos ejes?
Yo uso ScatterPlot para el gráfico.

JFreeChart chart = ChartFactory.createScatterPlot("Pole/zero plot", // chart
// title
"real", // x axis label
"imaginary", // y axis label
result, // data
PlotOrientation.VERTICAL, true, // include legend
true, // tooltips
false // urls
);
XYPlot plot = (XYPlot) chart.getPlot();
plot.setDomainGridlinesVisible(true);
plot.setRangeGridlinesVisible(true);
plot.setRangeGridlinePaint(Color.black);
plot.setDomainGridlinePaint(Color.black);
XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer();
renderer.setBaseItemLabelsVisible(true);
renderer.setBaseItemLabelsVisible(true, true);
plot.setDomainCrosshairVisible(true);
plot.setDomainCrosshairLockedOnData(true);
plot.setRangeCrosshairVisible(true);
plot.setRangeCrosshairLockedOnData(true);
float dash1[] = { 10.0f };
XYShapeAnnotation unitCircle = new XYShapeAnnotation(
new Ellipse2D.Double(-1, -1, 2, 2), new BasicStroke(1.0f,
BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10.0f,
dash1, 0.0f), Color.black);
plot.addAnnotation(unitCircle);
plot.setBackgroundPaint(Color.white);
chart.setAntiAlias(true);
chartPanel = new JPanel(new BorderLayout());
ChartPanel cp = new ChartPanel(chart);
cp.setMouseWheelEnabled(true);
cp.setToolTipText("test");
cp.setDisplayToolTips(true);
chartPanel.add(cp);

Answer 1

Leyenda de Sans , establecer el tamaño preferido de ChartPanel funciona bastante bien:

private static final int SIZE = 456;
chartPanel.setPreferredSize(new Dimension(SIZE, SIZE));

Ver también ¿Debería evitar el uso de los métodos set(Preferred|Maximum|Minimum)Size() en Java Swing? y esta respuesta con respecto al tamaño del gráfico.

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.geom.Ellipse2D;
import java.util.*;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.annotations.XYShapeAnnotation;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.NumberTickUnit;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
/**
* @see http://.com/questions/8048652
* @see http://.com/questions/7231824
* @see http://.com/questions/7205742
* @see http://.com/questions/7208657
* @see http://.com/questions/7071057
*/
public class ScatterAdd extends JFrame {
private static final int N = 8;
private static final int SIZE = 456;
private static final String title = "Scatter Add Demo";
private static final Random rand = new Random();
private XYSeries added = new XYSeries("Added");
public ScatterAdd(String s) {
super(s);
final ChartPanel chartPanel = createDemoPanel();
chartPanel.setPreferredSize(new Dimension(SIZE, SIZE));
this.add(chartPanel, BorderLayout.CENTER);
JPanel control = new JPanel();
control.add(new JButton(new AbstractAction("Add") {
@Override
public void actionPerformed(ActionEvent e) {
for (int i = 0; i < N; i++) {
added.add(rand.nextGaussian(), rand.nextGaussian());
}
}
}));
this.add(control, BorderLayout.SOUTH);
}
private ChartPanel createDemoPanel() {
JFreeChart jfreechart = ChartFactory.createScatterPlot(
title, "X", "Y", createSampleData(),
PlotOrientation.VERTICAL, false, true, false);
XYPlot xyPlot = (XYPlot) jfreechart.getPlot();
xyPlot.setDomainCrosshairVisible(true);
xyPlot.setRangeCrosshairVisible(true);
XYItemRenderer renderer = xyPlot.getRenderer();
renderer.setSeriesPaint(0, Color.blue);
adjustAxis((NumberAxis) xyPlot.getDomainAxis(), true);
adjustAxis((NumberAxis) xyPlot.getRangeAxis(), false);
XYShapeAnnotation unitCircle = new XYShapeAnnotation(
new Ellipse2D.Double(-1, -1, 2, 2), new BasicStroke(1.0f,
BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10.0f), Color.black);
xyPlot.addAnnotation(unitCircle);
xyPlot.setBackgroundPaint(Color.white);
return new ChartPanel(jfreechart);
}
private void adjustAxis(NumberAxis axis, boolean vertical) {
axis.setRange(-1.0, 1.0);
axis.setTickUnit(new NumberTickUnit(0.5));
axis.setVerticalTickLabels(vertical);
}
private XYDataset createSampleData() {
XYSeriesCollection xySeriesCollection = new XYSeriesCollection();
XYSeries series = new XYSeries("Random");
for (int i = 0; i < N * N; i++) {
series.add(rand.nextGaussian(), rand.nextGaussian());
}
xySeriesCollection.addSeries(series);
xySeriesCollection.addSeries(added);
return xySeriesCollection;
}
public static void main(String args[]) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
ScatterAdd demo = new ScatterAdd(title);
demo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
demo.pack();
demo.setLocationRelativeTo(null);
demo.setVisible(true);
}
});
}
}