ChartDirector 7.0 (Java Edition)

Scattered Data Surface Chart




This example demonstrates using scattered data for the surface chart. It also demonstrates hiding the plot region walls and changing their thickness and colors.

In previous surface chart examples, the data are gridded, which means the (x, y) coordinates of the data points lie on a rectangular grid. ChartDirector also supports scattered data points, which means the data points can be at arbitrary positions. ChartDirector automatically detects if the data passed to the surface chart using SurfaceChart.setData are gridded or scattered.

In this example, 2 of the 3 plot region walls are hidden using ThreeDChart.setWallVisibility. For the visible wall, its color is set to black using ThreeDChart.setWallColor, its thickness is set to 0 using ThreeDChart.setWallThickness, and its major and minor grid lines are set to white and grey using ThreeDChart.setWallGrid.

Source Code Listing

[JSP Version] jspdemo/scattersurface.jsp
<%@page import="ChartDirector.*, java.util.*" %> <% // The (x, y, z) coordinates of the scattered data double[] dataX = {0.5, 1.9, 4.9, 1.0, 8.9, 9.8, 5.9, 2.9, 6.8, 9.0, 0.0, 8.9, 1.9, 4.8, 2.4, 3.4, 7.9, 7.5, 4.8, 7.5, 9.5, 0.4, 8.9, 0.9, 5.4, 9.4, 2.9, 8.9, 0.9, 8.9, 10.0, 1.0, 6.8, 3.8, 9.0, 5.3, 6.4, 4.9, 4.5, 2.0, 5.4, 0.0, 10.0, 3.9, 5.4, 5.9, 5.8, 0.3, 4.4, 8.3}; double[] dataY = {3.3, 3.0, 0.7, 1.0, 9.3, 4.5, 8.4, 0.1, 0.8, 0.1, 9.3, 1.8, 4.3, 1.3, 2.3, 5.4, 6.9, 9.0, 9.8, 7.5, 1.8, 1.4, 4.5, 7.8, 3.8, 4.0, 2.9, 2.4, 3.9, 2.9, 2.3, 9.3, 2.0, 3.4, 4.8, 2.3, 3.4, 2.3, 1.5, 7.8, 4.5, 0.9, 6.3, 2.4, 6.9, 2.8, 1.3, 2.9, 6.4, 6.3}; double[] dataZ = {6.6, 12.5, 7.4, 6.2, 9.6, 13.6, 19.9, 2.2, 6.9, 3.4, 8.7, 8.4, 7.8, 8.0, 9.4, 11.9, 9.6, 15.7, 12.0, 13.3, 9.6, 6.4, 9.0, 6.9, 4.6, 9.7, 10.6, 9.2, 7.0, 6.9, 9.7, 8.6, 8.0, 13.6, 13.2, 5.9, 9.0, 3.2, 8.3, 9.7, 8.2, 6.1, 8.7, 5.6, 14.9, 9.8, 9.3, 5.1, 10.8, 9.8}; // Create a SurfaceChart object of size 680 x 550 pixels. Set background to brushed silver and // border to grey (888888). Set the top-left and bottom-right corners to rounded corners with 20 // pixels radius. SurfaceChart c = new SurfaceChart(680, 550, Chart.brushedSilverColor(), 0x888888); c.setRoundedFrame(0xffffff, 20, 0, 20, 0); // Add a title to the chart using 20 points Times New Roman Italic font. Set top/bottom margin to 8 // pixels. TextBox title = c.addTitle("Surface Created Using Scattered Data Points", "Times New Roman Italic", 20); title.setMargin2(0, 0, 8, 8); // Add a 2 pixel wide black (000000) separator line under the title c.addLine(10, title.getHeight(), c.getWidth() - 10, title.getHeight(), 0x000000, 2); // Set the center of the plot region at (290, 235), and set width x depth x height to 360 x 360 x // 180 pixels c.setPlotRegion(290, 235, 360, 360, 180); // Set the elevation and rotation angles to 45 and -45 degrees c.setViewAngle(45, -45); // Set the perspective level to 30 c.setPerspective(30); // Set the data to use to plot the chart c.setData(dataX, dataY, dataZ); // Add a color axis (the legend) in which the top right corner is anchored at (660, 80). Set the // length to 200 pixels and the labels on the right side. ColorAxis cAxis = c.setColorAxis(660, 80, Chart.TopRight, 200, Chart.Right); // Set the color axis title with 12 points Arial Bold font cAxis.setTitle("Z Title Placeholder", "Arial Bold", 12); // Add a bounding box with light grey (eeeeee) background and grey (888888) border. Set the top-left // and bottom-right corners to rounded corners of 10 pixels radius. cAxis.setBoundingBox(0xeeeeee, 0x888888); cAxis.setRoundedCorners(10, 0, 10, 0); // Set surface grid lines to semi-transparent black (cc000000) c.setSurfaceAxisGrid(0xcc000000); // Set contour lines to semi-transparent white (80ffffff) c.setContourColor(0x80ffffff); // Set the walls to black in color c.setWallColor(0x000000); // Set the xyz major wall grid lines to white (ffffff), and minor wall grid lines to grey (888888) c.setWallGrid(0xffffff, 0xffffff, 0xffffff, 0x888888, 0x888888, 0x888888); // Set the wall thickness to 0 c.setWallThickness(0, 0, 0); // Show only the xy wall, and hide the yz and zx walls. c.setWallVisibility(true, false, false); // Set the x, y and z axis titles using 12 points Arial Bold font c.xAxis().setTitle("X Title\nPlaceholder", "Arial Bold", 12); c.yAxis().setTitle("Y Title\nPlaceholder", "Arial Bold", 12); // Output the chart WebChartViewer viewer = new WebChartViewer(request, "chart1"); viewer.setChart(c, Chart.SVG); // Include tool tip for the chart viewer.setImageMap(c.getHTMLImageMap("", "", "title='<*cdml*><*b*>X: {x|2}<*br*>Y: {y|2}<*br*>Z: {z|2}'")); %> <!DOCTYPE html> <html> <head> <title>Scattered Data Surface Chart</title> <!-- Include ChartDirector Javascript Library to support chart interactions --> <script type="text/javascript" src="cdjcv.js"></script> </head> <body style="margin:5px 0px 0px 5px"> <div style="font:bold 18pt verdana;"> Scattered Data Surface Chart </div> <hr style="border:solid 1px #000080; background:#000080" /> <div style="font:10pt verdana; margin-bottom:1.5em"> <a href="viewsource.jsp?file=<%=request.getServletPath()%>">View Source Code</a> </div> <!-- ****** Here is the chart image ****** --> <%= viewer.renderHTML(response) %> </body> </html>