I am new to Contour Chart.
I have downloaded a Contour Chart's demo program, it shows the following chart, but which is not the one I want.
When I input the same data set to ms excel it generate the following chart.
And which is exactly what I want.
is there any function that can calculate the values betweens data points, so that it can generate a chart like the one generated by excel?
the source code of the Contour Chart's demo program is
Code: Select all
package charts.jfreechart;
import java.awt.Color;
import java.awt.GradientPaint;
import java.util.Date;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.ColorBar;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.LogarithmicAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.ContourPlot;
import org.jfree.data.ContourDataset;
import org.jfree.data.DefaultContourDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.chart.ui.ColorPalette;
import org.jfree.chart.ui.RainbowPalette;
public class JFree_Contour extends ApplicationFrame
{
public ChartPanel panel = null;
public JFree_Contour(String title)
{
super(title);
JFreeChart chart = createContourPlot();
panel = new ChartPanel(chart, true, true, true, true, true);
panel.setPreferredSize(new java.awt.Dimension(500, 270));
panel.setMaximumDrawHeight(100000); //stop ChartPanel from scaling output
panel.setMaximumDrawWidth(100000); //stop ChartPanel from scaling output
panel.setHorizontalZoom(true);
panel.setVerticalZoom(true);
panel.setFillZoomRectangle(true);
}
/**
* Creates a ContourPlot chart.
*
* @return the chart.
*/
private JFreeChart createContourPlot()
{
String title = "Contour Plot";
String xAxisLabel = "X Values";
String yAxisLabel = "Y Values";
String zAxisLabel = "Color Values";
ValueAxis xAxis = null;
NumberAxis yAxis = null;
ColorBar zColorBar = null;
xAxis = new NumberAxis(xAxisLabel);
yAxis = new NumberAxis(yAxisLabel);
zColorBar = new ColorBar(zAxisLabel);
((NumberAxis) xAxis).setAutoRangeIncludesZero(false);
yAxis.setAutoRangeIncludesZero(false);
((NumberAxis) xAxis).setLowerMargin(0.0);
((NumberAxis) xAxis).setUpperMargin(0.0);
yAxis.setLowerMargin(0.0);
yAxis.setUpperMargin(0.0);
zColorBar.getAxis().setTickMarksVisible(true);
zColorBar.setMinimumValue(-250);
zColorBar.setMaximumValue(200);
ContourDataset data = createDataset();
ColorPalette cp = new RainbowPalette();
double x[] = {-250,-200,-150,-100,-50, 0, 50, 100, 150, 200};
cp.setTickValues(x);
cp.setStepped(true);
zColorBar.setColorPalette(cp);
ContourPlot plot = new ContourPlot(data, xAxis, yAxis, zColorBar);
plot.setDataAreaRatio(0);
JFreeChart chart = new JFreeChart(title, null, plot, false);
return chart;
}
private ContourDataset createDataset()
{
ContourDataset data = null;
Double[] oDoubleX = new Double[25];
Double[] oDoubleY = new Double[25];
Double[] oDoubleZ = new Double[25];
// 10P
oDoubleX[0] = new Double(1);
oDoubleY[0] = new Double(10);
oDoubleZ[0] = new Double(-50);
oDoubleX[1] = new Double(1);
oDoubleY[1] = new Double(20);
oDoubleZ[1] = new Double(-38.50);
oDoubleX[2] = new Double(1);
oDoubleY[2] = new Double(30);
oDoubleZ[2] = new Double(-38.50);
oDoubleX[3] = new Double(1);
oDoubleY[3] = new Double(40);
oDoubleZ[3] = new Double(-38.50);
oDoubleX[4] = new Double(1);
oDoubleY[4] = new Double(50);
oDoubleZ[4] = new Double(-38.50);
// 25P
oDoubleX[5] = new Double(2);
oDoubleY[5] = new Double(10);
oDoubleZ[5] = new Double(-13.2);
oDoubleX[6] = new Double(2);
oDoubleY[6] = new Double(20);
oDoubleZ[6] = new Double(-41.05);
oDoubleX[7] = new Double(2);
oDoubleY[7] = new Double(30);
oDoubleZ[7] = new Double(-41.05);
oDoubleX[8] = new Double(2);
oDoubleY[8] = new Double(40);
oDoubleZ[8] = new Double(-41.05);
oDoubleX[9] = new Double(2);
oDoubleY[9] = new Double(50);
oDoubleZ[9] = new Double(-41.05);
// ATM
oDoubleX[10] = new Double(3);
oDoubleY[10] = new Double(10);
oDoubleZ[10] = new Double(-22.86);
oDoubleX[11] = new Double(3);
oDoubleY[11] = new Double(20);
oDoubleZ[11] = new Double(-138);
oDoubleX[12] = new Double(3);
oDoubleY[12] = new Double(30);
oDoubleZ[12] = new Double(-138);
oDoubleX[13] = new Double(3);
oDoubleY[13] = new Double(40);
oDoubleZ[13] = new Double(-138);
oDoubleX[14] = new Double(3);
oDoubleY[14] = new Double(50);
oDoubleZ[14] = new Double(-138);
// 25C
oDoubleX[15] = new Double(4);
oDoubleY[15] = new Double(10);
oDoubleZ[15] = new Double(-27.96);
oDoubleX[16] = new Double(4);
oDoubleY[16] = new Double(20);
oDoubleZ[16] = new Double(-51.91);
oDoubleX[17] = new Double(4);
oDoubleY[17] = new Double(30);
oDoubleZ[17] = new Double(-51.91);
oDoubleX[18] = new Double(4);
oDoubleY[18] = new Double(40);
oDoubleZ[18] = new Double(-51.91);
oDoubleX[19] = new Double(4);
oDoubleY[19] = new Double(50);
oDoubleZ[19] = new Double(-51.91);
// 10C
oDoubleX[20] = new Double(5);
oDoubleY[20] = new Double(10);
oDoubleZ[20] = new Double(-31.01);
oDoubleX[21] = new Double(5);
oDoubleY[21] = new Double(20);
oDoubleZ[21] = new Double(-56.73);
oDoubleX[22] = new Double(5);
oDoubleY[22] = new Double(30);
oDoubleZ[22] = new Double(-56.73);
oDoubleX[23] = new Double(5);
oDoubleY[23] = new Double(40);
oDoubleZ[23] = new Double(-56.73);
oDoubleX[24] = new Double(5);
oDoubleY[24] = new Double(50);
oDoubleZ[24] = new Double(-56.73);
data = new DefaultContourDataset("Contouring", oDoubleX, oDoubleY, oDoubleZ);
return data;
}
/**
* Starting point for the demonstration application.
*
* @param args command line options, launch ContourDemoPlot -? for listing of options.
*/
public static void main(String[] args)
{
JFree_Contour demo = new JFree_Contour("ContourPlot Demo");
demo.setContentPane(demo.panel);
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}
Andy