我在JFreeChart的散点图上有几千个点.
现在的问题是我的程序是用“正方形”绘制点,但是我需要一些帮助,如何将点的形状从“正方形”更改为“点/圆”.
任何帮助将不胜感激.
现在的问题是我的程序是用“正方形”绘制点,但是我需要一些帮助,如何将点的形状从“正方形”更改为“点/圆”.
任何帮助将不胜感激.
// *我正在使用ShapeUtilities,但是当我使用XYItemRenderer / XYDotRenderer时,它不会改变指向“DaigonalCross”的形状 – 如果在代码中出现任何错误,请进行任何更正.. * ///
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Shape;
import java.util.*;
import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYDotRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.util.ShapeUtilities;
public class SPlotfinal extends ApplicationFrame {
public SPlotfinal(String s) {
super(s);
JPanel jpanel = createDemoPanel();
jpanel.setPreferredSize(new Dimension(500,270));
setContentPane(jpanel);
}
public static JPanel createDemoPanel() {
JFreeChart jfreechart = ChartFactory.createScatterPlot("Scatter Plot Demo","X","Y",samplexydataset2(),PlotOrientation.VERTICAL,true,false);
Shape cross = ShapeUtilities.createDiagonalCross(3,1);
XYPlot xyPlot = (XYPlot) jfreechart.getPlot();
XYItemRenderer renderer = xyPlot.getRenderer();
renderer.setBaseShape(cross);
renderer.setBasePaint(Color.red);
//changing the Renderer to XYDotRenderer
//xyPlot.setRenderer(new XYDotRenderer());
XYDotRenderer xydotrenderer = new XYDotRenderer();
xyPlot.setRenderer(xydotrenderer);
xydotrenderer.setSeriesShape(0,cross);
xyPlot.setDomainCrosshairVisible(true);
xyPlot.setRangeCrosshairVisible(true);
return new ChartPanel(jfreechart);
}
private static XYDataset samplexydataset2() {
int cols = 20;
int rows = 20;
double[][] values = new double[cols][rows];
XYSeriesCollection xySeriesCollection = new XYSeriesCollection();
XYSeries series = new XYSeries("Random");
Random rand = new Random();
for (int i = 0; i < values.length; i++) {
for (int j = 0; j < values[i].length; j++) {
double x = Math.round(rand.nextDouble() * 500);
double y = Math.round(rand.nextDouble() * 500);
series.add(x,y);
}
}
xySeriesCollection.addSeries(series);
return xySeriesCollection;
}
public static void main(String args[]) {
SPlotfinal scatterplotdemo4 = new SPlotfinal("Scatter Plot Demo 4");
scatterplotdemo4.pack();
RefineryUtilities.centerFrameOnScreen(scatterplotdemo4);
scatterplotdemo4.setVisible(true);
}
}
解决方法
ScatterRenderer从0700继承
getItemShape().您可以覆盖
getItemShape()以提供您自己的形状.
附录：这种方法的一个优点是您可以为每个系列中的每个项目指定一个Shape.
附录：要使用ShapeUtilities.createDiagonalCross(),请执行以下操作：
Shape cross = ShapeUtilities.createDiagonalCross(3,1); plot = (XYPlot) chart.getPlot(); renderer = plot.getRenderer(); renderer.setSeriesShape(0,cross);
附录：只需切换到setSeriesShape().另外,跳过XYDotRenderer和Math.round().
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Shape;
import java.util.*;
import javax.swing.JPanel;
import org.jfree.chart.*;
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;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.util.ShapeUtilities;
public class SPlotfinal extends ApplicationFrame {
public SPlotfinal(String s) {
super(s);
JPanel jpanel = createDemoPanel();
jpanel.setPreferredSize(new Dimension(640,480));
add(jpanel);
}
public static JPanel createDemoPanel() {
JFreeChart jfreechart = ChartFactory.createScatterPlot(
"Scatter Plot Demo",1);
XYPlot xyPlot = (XYPlot) jfreechart.getPlot();
xyPlot.setDomainCrosshairVisible(true);
xyPlot.setRangeCrosshairVisible(true);
XYItemRenderer renderer = xyPlot.getRenderer();
renderer.setSeriesShape(0,cross);
renderer.setSeriesPaint(0,Color.red);
return new ChartPanel(jfreechart);
}
private static XYDataset samplexydataset2() {
int cols = 20;
int rows = 20;
double[][] values = new double[cols][rows];
XYSeriesCollection xySeriesCollection = new XYSeriesCollection();
XYSeries series = new XYSeries("Random");
Random rand = new Random();
for (int i = 0; i < values.length; i++) {
for (int j = 0; j < values[i].length; j++) {
double x = rand.nextGaussian();
double y = rand.nextGaussian();
series.add(x,y);
}
}
xySeriesCollection.addSeries(series);
return xySeriesCollection;
}
public static void main(String args[]) {
SPlotfinal scatterplotdemo4 = new SPlotfinal("Scatter Plot Demo 4");
scatterplotdemo4.pack();
RefineryUtilities.centerFrameOnScreen(scatterplotdemo4);
scatterplotdemo4.setVisible(true);
}
}