ChartDirector 7.0 (PHP Edition)

Simple Rose Chart




This example demonstrates how to create a rose chart.

A rose chart is basically a polar chart with sectors of variable radius. This can be achieved by creating a PolarChart object as the graph paper, and adding sector zones on it using AngularAxis.addZone.

To enable auto-scale of the axis, in this example, we also add the radius data to a transparent line layer using PolarChart.addLineLayer. The line layer has no visible effect, but it causes the radial axis to auto-scale so that it covers the radius data.

Source Code Listing

[File: phpdemo/rose.php]
<?php require_once("../lib/phpchartdir.php"); # Data for the chart $data = array(9.4, 1.8, 2.1, 2.3, 3.5, 7.7, 8.8, 6.1, 5.0, 3.1, 6.0, 4.3, 5.1, 2.6, 1.5, 2.2, 5.1, 4.3, 4.0, 9.0, 1.7, 8.8, 9.9, 9.5); $angles = array(0, 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300, 315, 330, 345); # Create a PolarChart object of size 460 x 460 pixels, with a silver background and a 1 pixel 3D # border $c = new PolarChart(460, 460, silverColor(), 0x000000, 1); # Add a title to the chart at the top left corner using 15pt Arial Bold Italic font. Use white text # on deep blue background. $c->addTitle("Polar Vector Chart Demonstration", "Arial Bold Italic", 15, 0xffffff)->setBackground( 0x000080); # Set plot area center at (230, 240) with radius 180 pixels and white background $c->setPlotArea(230, 240, 180, 0xffffff); # Set the grid style to circular grid $c->setGridStyle(false); # Set angular axis as 0 - 360, with a spoke every 30 units $c->angularAxis->setLinearScale(0, 360, 30); # Add sectors to the chart as sector zones for($i = 0; $i < count($data); ++$i) { $c->angularAxis->addZone($angles[$i], $angles[$i] + 15, 0, $data[$i], 0x33ff33, 0x008000); } # Add an Transparent invisible layer to ensure the axis is auto-scaled using the data $c->addLineLayer($data, Transparent); # Output the chart $viewer = new WebChartViewer("chart1"); $viewer->setChart($c, SVG); ?> <!DOCTYPE html> <html> <head> <title>Simple Rose 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;"> Simple Rose Chart </div> <hr style="border:solid 1px #000080; background:#000080" /> <div style="font:10pt verdana; margin-bottom:1.5em"> <a href="viewsource.php?file=<?=basename(__FILE__)?>">View Chart Source Code</a> </div> <!-- ****** Here is the chart image ****** --> <?php echo $viewer->renderHTML(); ?> </body> </html>