How to draw a chart with multiple y-axises

[Ray Kumar]

Hi

How to draw a single Chart with multiple y-axis and sharing the same x-aixs, each y-aixs may contain one or more series. I appreciate any example code/samples on this one. I am using JClass from Quest software.

Ex:

20||
Graph 3 ||
10||
||
0|______________________________|
3||
||
Graph 22||
||
1|______________________________|
8||
6||
||
Graph 1 4||
||
2|______________________________|
15101520

X-Axis Title




Thanks in advance!!!
Ray

[Ray Kumar]

Above diagram is not displayed correctly, I am trying again.



20| |
Graph 3 | |
10| |
| |
0| |
-------------------------------
3| |
| |
Graph 2 2| |
| |
1| |
-------------------------------
| |
6| |
| |
Graph 1 4| |
| |
2| |
-------------------------------
15101520
X-Axis Title

[Ray Kumar]

[Ray Kumar]

I am trying to display the graph model again.

[Craig Wood]

import java.awt.*;
import java.awt.event.*;
import java.awt.font.*;
import java.awt.geom.*;
import javax.swing.*;
 
public class VerticalPlot
{
    public VerticalPlot()
    {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new VerticalPlotPanel());
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
 
    public static void main(String[] args)
    {
        new VerticalPlot();
    }
}
 
class VerticalPlotPanel extends JPanel
{
    final int PAD = 20;
 
    protected void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        int w = getWidth();
        int h = getHeight();
 
        // abcissas- bottom
        g2.draw(new Line2D.Double(PAD, h-PAD, w-PAD, h-PAD));
        // labels
        Font font = getFont().deriveFont(14f);
        g2.setFont(font);
        FontRenderContext frc = g2.getFontRenderContext();
        String[] s = { "1", "5", "10", "15", "20" };
        for(int j = 0; j < s.length; j++)
        {
            float width = (float)font.getStringBounds(s[j], frc).getWidth();
            float height = font.getLineMetrics(s[j], frc).getAscent();
            float sx = PAD + j *(w - 2*PAD)/(s.length-1) - width/2;
            float sy = h - PAD + height + 4;
            g2.drawString(s[j], sx, sy);
        }
        // middle
        double y = PAD + (h-2*PAD)*2/3;
        g2.draw(new Line2D.Double(PAD, y, w-PAD, y));
        // top
        y = PAD + (h-2*PAD)/3;
        g2.draw(new Line2D.Double(PAD, y, w-PAD, y));
 
        // ordinate
        g2.draw(new Line2D.Double(PAD, PAD, PAD, h-PAD));
        // labels - top
        double vSpan = (h-4*PAD)/3;
        s = new String[] { "20", "10", "0", };
        double yInc = vSpan/(s.length-1);
        for(int j = 0; j < s.length; j++)
        {
            float width = (float)font.getStringBounds(s[j], frc).getWidth();
            float height = font.getLineMetrics(s[j], frc).getAscent();
            float sx = PAD - width - 2;
            float sy = (float)(PAD + j * yInc + height);
            g2.drawString(s[j], sx, sy);
        }
        // middle
        s = new String[] { "3", "2", "1" };
        y = PAD + (h-2*PAD)/3;
        for(int j = 0; j < s.length; j++)
        {
            float width = (float)font.getStringBounds(s[j], frc).getWidth();
            float height = font.getLineMetrics(s[j], frc).getAscent();
            float sx = PAD - width - 2;
            float sy = (float)(y + j * yInc + height);
            g2.drawString(s[j], sx, sy);
        }
        // bottom
        s = new String[] { "8", "6", "4", "2" };
        y = PAD + (h-2*PAD)*2/3;
        yInc = vSpan/(s.length-1);
        for(int j = 0; j < s.length; j++)
        {
            float width = (float)font.getStringBounds(s[j], frc).getWidth();
            float height = font.getLineMetrics(s[j], frc).getAscent();
            float sx = PAD - width - 2;
            float sy = (float)(y + j * yInc + height);
            g2.drawString(s[j], sx, sy);
        }
 
        // draw lines - bottom
        vSpan = (h-2*PAD)/3;
        g2.setPaint(Color.red);
        double x1 = PAD, y1 = h-PAD, x2 = PAD + (w-2*PAD)/2, y2 = y1 - vSpan;
        g2.draw(new Line2D.Double(x1, y1, x2, y2));
        // middle
        g2.setPaint(Color.green.darker());
        y1 = h-PAD - 2*vSpan; x2 = w-PAD; y2 = y1 + 0.8 * vSpan;
        g2.draw(new Line2D.Double(x1, y1, x2, y2));
        // top
        g2.setPaint(Color.blue);
        y1 = PAD + vSpan/2; y2 = PAD + vSpan;
        g2.draw(new Line2D.Double(x1, y1, x2, y2));
    }
}

[Ilja Preuss]

Ray,

to preserve the formatting of text, use the ubb code tags.

[Ray Kumar]

Thank you for the code example.

I have to plot more than one series in each graph. Any code examples using JClass from sitraka appreciated. I am able to draw multiple series in one graph, but I want to plot multiple graphs with diffent y-axis ranges as show in the graph with the same x-axis.


Thanks in Advance.
Phani