Min & Max Lines

Min and max lines are a common way to identity data partition and boundaries on a chart. In phpChart the min and max are treated just like regular data series. No special function or plugin is required.

For example:

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$line1 = array(array(1,1), array(4,2), array(9,3), array(16,4));
$line2 = array(array(25,1), array(12.5,2), array(6.25,3), array(3.125,4));
$min = array(array(2, 0.6), array(2, 4.4));
$max = array(array(15, 0.6), array(15, 4.4));

$pc = new C_PhpChartX(array($line1,$line2, $min,$max),'chart1');

Live demo