Contour Chart

[File: phpdemo/contour.php]
<?php
require_once("../lib/phpchartdir.php");

# The x and y coordinates of the grid
$dataX = array(-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
$dataY = array(-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

# The values at the grid points. In this example, we will compute the values using the formula z = x
# * sin(y) + y * sin(x).
$dataZ = array_fill(0, count($dataX) * count($dataY), 0);
for($yIndex = 0; $yIndex < count($dataY); ++$yIndex) {
    $y = $dataY[$yIndex];
    for($xIndex = 0; $xIndex < count($dataX); ++$xIndex) {
        $x = $dataX[$xIndex];
        $dataZ[$yIndex * count($dataX) + $xIndex] = $x * sin($y) + $y * sin($x);
    }
}

# Create a XYChart object of size 600 x 500 pixels
$c = new XYChart(600, 500);

# Add a title to the chart using 15 points Arial Bold Italic font
$c->addTitle("z = x * sin(y) + y * sin(x)      ", "Arial Bold Italic", 15);

# Set the plotarea at (75, 40) and of size 400 x 400 pixels. Use semi-transparent black (80000000)
# dotted lines for both horizontal and vertical grid lines
$c->setPlotArea(75, 40, 400, 400, -1, -1, -1, $c->dashLineColor(0x80000000, DotLine), -1);

# Set x-axis and y-axis title using 12 points Arial Bold Italic font
$c->xAxis->setTitle("X-Axis Title Place Holder", "Arial Bold Italic", 12);
$c->yAxis->setTitle("Y-Axis Title Place Holder", "Arial Bold Italic", 12);

# Set x-axis and y-axis labels to use Arial Bold font
$c->xAxis->setLabelStyle("Arial Bold");
$c->yAxis->setLabelStyle("Arial Bold");

# When auto-scaling, use tick spacing of 40 pixels as a guideline
$c->yAxis->setTickDensity(40);
$c->xAxis->setTickDensity(40);

# Add a contour layer using the given data
$layer = $c->addContourLayer($dataX, $dataY, $dataZ);

# Move the grid lines in front of the contour layer
$c->getPlotArea()->moveGridBefore($layer);

# Add a color axis (the legend) in which the top left corner is anchored at (505, 40). Set the
# length to 400 pixels and the labels on the right side.
$cAxis = $layer->setColorAxis(505, 40, TopLeft, 400, Right);

# Add a title to the color axis using 12 points Arial Bold Italic font
$cAxis->setTitle("Color Legend Title Place Holder", "Arial Bold Italic", 12);

# Set color axis labels to use Arial Bold font
$cAxis->setLabelStyle("Arial Bold");

# Output the chart
$viewer = new WebChartViewer("chart1");
$viewer->setChart($c, 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}''"));

# Output Javascript chart model to support contour chart tooltips
$viewer->setChartModel($c->getJsChartModel());
?>

<!DOCTYPE html>
<html>
<head>
    <title>Contour 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;">
        Contour 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>