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package plotter.examples;
import java.awt.Color;
import java.text.DecimalFormat;
import javax.swing.JFrame;
import plotter.ExpFormat;
import plotter.LogTickMarkCalculator;
import plotter.xy.LinearXYAxis;
import plotter.xy.LinearXYPlotLine;
import plotter.xy.SimpleXYDataset;
import plotter.xy.XYAxis;
import plotter.xy.XYDimension;
/**
* Demonstrates plotting with a logarithmic Y axis.
* Note that this approach involves manually applying the logarithm function to data points before adding them to the dataset.
* This also requires adjusting the format for the axis to use a {@link ExpFormat} so it will display the original values instead of their logarithms.
* The rationale for all this is to reduce the number of times the logarithm of the data points must be calculated.
* @author Adam Crume
*/
public class LogPlot {
public static void main(String[] args) {
XYPlotFrame frame = new XYPlotFrame() {
private static final long serialVersionUID = 1L;
@Override
protected XYAxis createYAxis() {
LinearXYAxis axis = new LinearXYAxis(XYDimension.Y);
axis.setTickMarkCalculator(new LogTickMarkCalculator());
axis.setFormat(new ExpFormat(new DecimalFormat("#.#")));
return axis;
}
};
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setup();
XYAxis xAxis = frame.getXAxis();
XYAxis yAxis = frame.getYAxis();
final LinearXYPlotLine line = new LinearXYPlotLine(xAxis, yAxis, XYDimension.X);
line.setForeground(Color.white);
final SimpleXYDataset d = new SimpleXYDataset(line);
d.setMaxCapacity(1000);
d.setXData(line.getXData());
d.setYData(line.getYData());
frame.addPlotLine(line);
yAxis.setStart(-1.2);
yAxis.setEnd(3.2);
xAxis.setStart(0);
xAxis.setEnd(2 * Math.PI);
for(int x = 0; x <= 100; x++) {
double x2 = x / 100.0 * 2 * Math.PI;
double y2 = 100 * (Math.sin(x2) + 1) + 1;
d.add(x2, Math.log10(y2));
}
frame.setSize(400, 300);
frame.setVisible(true);
}
}