ChartDirector 6.1 (Java Edition)

Bubble XY Scaling




This example demonstrates a bubble chart with independent x and y bubble sizes and non-circular bubbles.

In ChartDirector, a bubble chart in general is a scatter layer with the symbol sizes controlled by some other data series.

ChartDirector supports using arbitrary symbols as bubbles. Thus bubble shape is not limited to circle but can be any shapes.

Furthermore, ChartDirector supports independent x and y sizes for bubbles. This is useful for creating charts in which the bubbles reflect some features of the data points, such as its confidence zone, x and y errors, x and y standard deviations, etc.

Source Code Listing

[JSP Version] jspdemo/bubblescale.jsp
<%@page import="ChartDirector.*" %>
<%
// The XY points for the bubble chart. The bubble chart has independent bubble size on the X and Y
// direction.
double[] dataX0 = {1000, 1500, 1700};
double[] dataY0 = {25, 20, 65};
double[] dataZX0 = {500, 200, 600};
double[] dataZY0 = {15, 30, 20};

double[] dataX1 = {500, 1000, 1300};
double[] dataY1 = {35, 50, 75};
double[] dataZX1 = {800, 300, 500};
double[] dataZY1 = {8, 27, 25};

double[] dataX2 = {150, 300};
double[] dataY2 = {20, 60};
double[] dataZX2 = {160, 400};
double[] dataZY2 = {30, 20};

// Create a XYChart object of size 450 x 420 pixels
XYChart c = new XYChart(450, 420);

// Set the plotarea at (55, 65) and of size 350 x 300 pixels, with a light grey border (0xc0c0c0).
// Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0)
c.setPlotArea(55, 65, 350, 300, -1, -1, 0xc0c0c0, 0xc0c0c0, -1);

// Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 12pt Times Bold
// Italic font. Set the background and border color to Transparent.
c.addLegend(50, 30, false, "Times New Roman Bold Italic", 12).setBackground(Chart.Transparent);

// Add a title to the chart using 18pt Times Bold Itatic font.
c.addTitle("Plasma Battery Comparison", "Times New Roman Bold Italic", 18);

// Add titles to the axes using 12pt Arial Bold Italic font
c.yAxis().setTitle("Operating Current", "Arial Bold Italic", 12);
c.xAxis().setTitle("Operating Voltage", "Arial Bold Italic", 12);

// Set the axes line width to 3 pixels
c.xAxis().setWidth(3);
c.yAxis().setWidth(3);

// Add (dataX0, dataY0) as a standard scatter layer, and also as a "bubble" scatter layer, using
// circles as symbols. The "bubble" scatter layer has symbol size modulated by (dataZX0, dataZY0)
// using the scale on the x and y axes.
c.addScatterLayer(dataX0, dataY0, "Vendor A", Chart.CircleSymbol, 9, 0xff3333, 0xff3333);
c.addScatterLayer(dataX0, dataY0, "", Chart.CircleSymbol, 9, 0x80ff3333, 0x80ff3333).setSymbolScale(
    dataZX0, Chart.XAxisScale, dataZY0, Chart.YAxisScale);

// Add (dataX1, dataY1) as a standard scatter layer, and also as a "bubble" scatter layer, using
// squares as symbols. The "bubble" scatter layer has symbol size modulated by (dataZX1, dataZY1)
// using the scale on the x and y axes.
c.addScatterLayer(dataX1, dataY1, "Vendor B", Chart.SquareSymbol, 7, 0x3333ff, 0x3333ff);
c.addScatterLayer(dataX1, dataY1, "", Chart.SquareSymbol, 9, 0x803333ff, 0x803333ff).setSymbolScale(
    dataZX1, Chart.XAxisScale, dataZY1, Chart.YAxisScale);

// Add (dataX2, dataY2) as a standard scatter layer, and also as a "bubble" scatter layer, using
// diamonds as symbols. The "bubble" scatter layer has symbol size modulated by (dataZX2, dataZY2)
// using the scale on the x and y axes.
c.addScatterLayer(dataX2, dataY2, "Vendor C", Chart.DiamondSymbol, 9, 0x00ff00, 0x00ff00);
c.addScatterLayer(dataX2, dataY2, "", Chart.DiamondSymbol, 9, 0x8033ff33, 0x8033ff33
    ).setSymbolScale(dataZX2, Chart.XAxisScale, dataZY2, Chart.YAxisScale);

// Output the chart
String chart1URL = c.makeSession(request, "chart1");

// Include tool tip for the chart
String imageMap1 = c.getHTMLImageMap("", "",
    "title='Voltage = {x} +/- {={zx}/2} V, Current = {value} +/- {={zy}/2} A'");
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Bubble XY Scaling
</div>
<hr color="#000080">
<div style="font-size:10pt; font-family:verdana; margin-bottom:1.5em">
    <a href="viewsource.jsp?file=<%=request.getServletPath()%>">View Source Code</a>
</div>
<img src='<%=response.encodeURL("getchart.jsp?"+chart1URL)%>'
    usemap="#map1" border="0">
<map name="map1"><%=imageMap1%></map>
</body>
</html>

[Java Version] javademo/bubblescale.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class bubblescale implements DemoModule
{
    //Name of demo program
    public String toString() { return "Bubble XY Scaling"; }

    //Number of charts produced in this demo
    public int getNoOfCharts() { return 1; }

    //Main code for creating charts
    public void createChart(ChartViewer viewer, int chartIndex)
    {
        // The XY points for the bubble chart. The bubble chart has independent bubble size on the X
        // and Y direction.
        double[] dataX0 = {1000, 1500, 1700};
        double[] dataY0 = {25, 20, 65};
        double[] dataZX0 = {500, 200, 600};
        double[] dataZY0 = {15, 30, 20};

        double[] dataX1 = {500, 1000, 1300};
        double[] dataY1 = {35, 50, 75};
        double[] dataZX1 = {800, 300, 500};
        double[] dataZY1 = {8, 27, 25};

        double[] dataX2 = {150, 300};
        double[] dataY2 = {20, 60};
        double[] dataZX2 = {160, 400};
        double[] dataZY2 = {30, 20};

        // Create a XYChart object of size 450 x 420 pixels
        XYChart c = new XYChart(450, 420);

        // Set the plotarea at (55, 65) and of size 350 x 300 pixels, with a light grey border
        // (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color
        // (0xc0c0c0)
        c.setPlotArea(55, 65, 350, 300, -1, -1, 0xc0c0c0, 0xc0c0c0, -1);

        // Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 12pt Times
        // Bold Italic font. Set the background and border color to Transparent.
        c.addLegend(50, 30, false, "Times New Roman Bold Italic", 12).setBackground(
            Chart.Transparent);

        // Add a title to the chart using 18pt Times Bold Itatic font.
        c.addTitle("Plasma Battery Comparison", "Times New Roman Bold Italic", 18);

        // Add titles to the axes using 12pt Arial Bold Italic font
        c.yAxis().setTitle("Operating Current", "Arial Bold Italic", 12);
        c.xAxis().setTitle("Operating Voltage", "Arial Bold Italic", 12);

        // Set the axes line width to 3 pixels
        c.xAxis().setWidth(3);
        c.yAxis().setWidth(3);

        // Add (dataX0, dataY0) as a standard scatter layer, and also as a "bubble" scatter layer,
        // using circles as symbols. The "bubble" scatter layer has symbol size modulated by
        // (dataZX0, dataZY0) using the scale on the x and y axes.
        c.addScatterLayer(dataX0, dataY0, "Vendor A", Chart.CircleSymbol, 9, 0xff3333, 0xff3333);
        c.addScatterLayer(dataX0, dataY0, "", Chart.CircleSymbol, 9, 0x80ff3333, 0x80ff3333
            ).setSymbolScale(dataZX0, Chart.XAxisScale, dataZY0, Chart.YAxisScale);

        // Add (dataX1, dataY1) as a standard scatter layer, and also as a "bubble" scatter layer,
        // using squares as symbols. The "bubble" scatter layer has symbol size modulated by
        // (dataZX1, dataZY1) using the scale on the x and y axes.
        c.addScatterLayer(dataX1, dataY1, "Vendor B", Chart.SquareSymbol, 7, 0x3333ff, 0x3333ff);
        c.addScatterLayer(dataX1, dataY1, "", Chart.SquareSymbol, 9, 0x803333ff, 0x803333ff
            ).setSymbolScale(dataZX1, Chart.XAxisScale, dataZY1, Chart.YAxisScale);

        // Add (dataX2, dataY2) as a standard scatter layer, and also as a "bubble" scatter layer,
        // using diamonds as symbols. The "bubble" scatter layer has symbol size modulated by
        // (dataZX2, dataZY2) using the scale on the x and y axes.
        c.addScatterLayer(dataX2, dataY2, "Vendor C", Chart.DiamondSymbol, 9, 0x00ff00, 0x00ff00);
        c.addScatterLayer(dataX2, dataY2, "", Chart.DiamondSymbol, 9, 0x8033ff33, 0x8033ff33
            ).setSymbolScale(dataZX2, Chart.XAxisScale, dataZY2, Chart.YAxisScale);

        // Output the chart
        viewer.setChart(c);

        //include tool tip for the chart
        viewer.setImageMap(c.getHTMLImageMap("clickable", "",
            "title='Voltage = {x} +/- {={zx}/2} V, Current = {value} +/- {={zy}/2} A'"));
    }

    //Allow this module to run as standalone program for easy testing
    public static void main(String[] args)
    {
        //Instantiate an instance of this demo module
        DemoModule demo = new bubblescale();

        //Create and set up the main window
        JFrame frame = new JFrame(demo.toString());
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {System.exit(0);} });
        frame.getContentPane().setBackground(Color.white);

        // Create the chart and put them in the content pane
        ChartViewer viewer = new ChartViewer();
        demo.createChart(viewer, 0);
        frame.getContentPane().add(viewer);

        // Display the window
        frame.pack();
        frame.setVisible(true);
    }
}