polarbubble.php
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<![CDATA[
<?php
require_once("../lib/phpchartdir.php");
# The data for the chart
$data0 = array(6, 12.5, 18.2, 15);
$angles0 = array(45, 96, 169, 258);
$size0 = array(41, 105, 12, 20);
$data1 = array(18, 16, 11, 14);
$angles1 = array(30, 210, 240, 310);
$size1 = array(30, 45, 12, 90);
# Create a PolarChart object of size 460 x 460 pixels
$c = new PolarChart(460, 460);
# Add a title to the chart at the top left corner using 15pt Arial Bold Italic font
$c->addTitle2(TopLeft, "<*underline=2*>EM Field Strength", "Arial Bold Italic", 15);
# Set center of plot area at (230, 240) with radius 180 pixels
$c->setPlotArea(230, 240, 180);
# Use alternative light grey/dark grey circular background color
$c->setPlotAreaBg(0xdddddd, 0xeeeeee);
# Set the grid style to circular grid
$c->setGridStyle(false);
# Add a legend box at the top right corner of the chart using 9pt Arial Bold font
$c->addLegend(459, 0, true, "Arial Bold", 9)->setAlignment(TopRight);
# Set angular axis as 0 - 360, with a spoke every 30 units
$c->angularAxis->setLinearScale(0, 360, 30);
# Set the radial axis label format
$c->radialAxis->setLabelFormat("{value} km");
# Add a blue (0x9999ff) line layer to the chart using (data0, angle0)
$layer0 = $c->addLineLayer($data0, 0x9999ff, "Cold Spot");
$layer0->setAngles($angles0);
# Disable the line by setting its width to 0, so only the symbols are visible
$layer0->setLineWidth(0);
# Use a circular data point symbol
$layer0->setDataSymbol(CircleSymbol, 11);
# Modulate the symbol size by size0 to produce a bubble chart effect
$layer0->setSymbolScale($size0);
# Add a red (0xff9999) line layer to the chart using (data1, angle1)
$layer1 = $c->addLineLayer($data1, 0xff9999, "Hot Spot");
$layer1->setAngles($angles1);
# Disable the line by setting its width to 0, so only the symbols are visible
$layer1->setLineWidth(0);
# Use a circular data point symbol
$layer1->setDataSymbol(CircleSymbol, 11);
# Modulate the symbol size by size1 to produce a bubble chart effect
$layer1->setSymbolScale($size1);
# Output the chart
$viewer = new WebChartViewer("chart1");
$viewer->setChart($c, SVG);
# Include tool tip for the chart
$viewer->setImageMap($c->getHTMLImageMap("", "",
"title='{dataSetName} at ({value} km, {angle} deg)\nStrength = {z} Watt'"));
?>
<!DOCTYPE html>
<html>
<head>
<title>Polar Bubble 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;">
Polar Bubble 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>
]]>