Pareto Chart

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

# The data for the chart
$data = array(40, 15, 7, 5, 2);

# The labels for the chart
$labels = array("Hard Disk", "PCB", "Printer", "CDROM", "Keyboard");

# In the pareto chart, the line data are just the accumulation of the raw data, scaled to a range of
# 0 - 100%
$lineData = new ArrayMath($data);
$lineData->acc();
$scaleFactor = $lineData->max() / 100;
if ($scaleFactor == 0) {
    # Avoid division by zero error for zero data
    $scaleFactor = 1;
}
$lineData->div2($scaleFactor);

# Create a XYChart object of size 480 x 300 pixels. Set background color to brushed silver, with a
# grey (bbbbbb) border and 2 pixel 3D raised effect. Use rounded corners. Enable soft drop shadow.
$c = new XYChart(400, 300, brushedSilverColor(), 0xbbbbbb, 2);
$c->setRoundedFrame();
$c->setDropShadow();

# Add a title to the chart using 15 points Arial Italic. Set top/bottom margins to 12 pixels.
$title = $c->addTitle("Pareto Chart Demonstration", "Arial Italic", 15);
$title->setMargin2(0, 0, 12, 12);

# Tentatively set the plotarea at (50, 40). Set the width to 100 pixels less than the chart width,
# and the height to 80 pixels less than the chart height. Use pale grey (f4f4f4) background,
# transparent border, and dark grey (444444) dotted grid lines.
$c->setPlotArea(50, 40, $c->getWidth() - 100, $c->getHeight() - 80, 0xf4f4f4, -1, Transparent,
    $c->dashLineColor(0x444444, DotLine));

# Add a line layer for the pareto line
$lineLayer = $c->addLineLayer2();

# Add the pareto line using deep blue (0000ff) as the color, with circle symbols
$lineLayer->addDataSet($lineData->result(), 0x0000ff)->setDataSymbol(CircleShape, 9, 0x0000ff,
    0x0000ff);

# Set the line width to 2 pixel
$lineLayer->setLineWidth(2);

# Bind the line layer to the secondary (right) y-axis.
$lineLayer->setUseYAxis2();

# Tool tip for the line layer
$lineLayer->setHTMLImageMap("", "", "title='Top {={x}+1} items: {value|2}%'");

# Add a multi-color bar layer using the given data.
$barLayer = $c->addBarLayer3($data);

# Set soft lighting for the bars with light direction from the right
$barLayer->setBorderColor(Transparent, softLighting(Right));

# Tool tip for the bar layer
$barLayer->setHTMLImageMap("", "", "title='{xLabel}: {value} pieces'");

# Set the labels on the x axis.
$c->xAxis->setLabels($labels);

# Set the secondary (right) y-axis scale as 0 - 100 with a tick every 20 units
$c->yAxis2->setLinearScale(0, 100, 20);

# Set the format of the secondary (right) y-axis label to include a percentage sign
$c->yAxis2->setLabelFormat("{value}%");

# Set the relationship between the two y-axes, which only differ by a scaling factor
$c->yAxis->syncAxis($c->yAxis2, $scaleFactor);

# Set the format of the primary y-axis label foramt to show no decimal point
$c->yAxis->setLabelFormat("{value|0}");

# Add a title to the primary y-axis
$c->yAxis->setTitle("Frequency");

# Set all axes to transparent
$c->xAxis->setColors(Transparent);
$c->yAxis->setColors(Transparent);
$c->yAxis2->setColors(Transparent);

# Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels from the
# left edge, just below the title, 10 pixels from the right edge, and 20 pixels from the bottom
# edge.
$c->packPlotArea(10, $title->getHeight(), $c->getWidth() - 10, $c->getHeight() - 20);

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

# Include tool tip for the chart
$viewer->setImageMap($c->getHTMLImageMap(""));
?>

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