function test_count_data_sets($data, $data_type, $expected)
{
$n = count_data_sets($data, $data_type);
if ($n == $expected) {
$result = "Pass";
} else {
$result = "FAIL: Expected {$expected} but got";
}
echo "{$result}: {$n} data sets, {$data_type} with " . count($data) . " records.\n";
}
# PHPlot / contrib / color_range : Example
# $Id$
# This is a bar chart with a color gradient for the bars in each group.
require_once 'phplot.php';
require_once 'color_range.php';
$bars_per_group = 10;
$x_values = 4;
mt_srand(1);
$data = array();
for ($i = 0; $i < $x_values; $i++) {
$row = array($i);
for ($j = 0; $j < $bars_per_group; $j++) {
$row[] = mt_rand(0, 100);
}
$data[] = $row;
}
$p = new PHPlot(800, 600);
$p->SetTitle('Example - Bar Chart with gradient colors');
$p->SetDataType('text-data');
$p->SetDataValues($data);
$p->SetPlotAreaWorld(0, 0, $x_values, 100);
# This isn't necessary, as we do know how many data sets (bars_per_group):
$n_data = count_data_sets($data, 'text-data');
# Make a gradient color map:
$colors = color_range($p->SetRGBColor('SkyBlue'), $p->SetRGBColor('DarkGreen'), $n_data);
$p->SetDataColors($colors);
$p->SetXTickLabelPos('none');
$p->SetXTickPos('none');
$p->SetPlotType('bars');
$p->DrawGraph();
