basic_contourex01.php
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<?php // content="text/plain; charset=utf-8"
// Basic contour plot example
 
require_once ("jpgraph/jpgraph.php");
require_once ("jpgraph/jpgraph_contour.php");
 
$data = array(
            array (0.5,1.1,1.5,1,2.0,3,3,2,1,0.1),
            array (1.0,1.5,3.0,5,6.0,2,1,1.2,1,4),
            array (0.9,2.0,2.1,3,6.0,7,3,2,1,1.4),
            array (1.0,1.5,3.0,4,6.0,5,2,1.5,1,2),
            array (0.8,2.0,3.0,3,4.0,4,3,2.4,2,3),
            array (0.6,1.1,1.5,1,4.0,3.5,3,2,3,4),
            array (1.0,1.5,3.0,5,6.0,2,1,1.2,2.7,4),
            array (0.8,2.0,3.0,3,5.5,6,3,2,1,1.4),
            array (1.0,1.5,3.0,4,6.0,5,2,1,0.5,0.2));
 
// Basic contour graph
$graph = new Graph(350,250);
$graph->SetScale('intint');
 
// Adjust the margins to fit the margin
$graph->SetMargin(30,100,40,30);
 
// Setup
$graph->title->Set('Basic contour plot');
$graph->title->SetFont(FF_ARIAL,FS_BOLD,12);
 
// A simple contour plot with default arguments (e.g. 10 isobar lines)
$cp = new ContourPlot($data);
 
// Display the legend
$cp->ShowLegend();
 
$graph->Add($cp);
 
// ... and send the graph back to the browser
$graph->Stroke();
 
?>