basic_contourex03-3.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 ( 12,7,3,15 ),
                array ( 18,5,1, 9 ),
                array ( 13,9,5,12),
                array (  5,3,8, 9 ),
                array (  1,8,5, 7 ));

    // Basic contour graph
    $graph = new Graph(350,250);
    $graph->SetScale('intint');

    // Show axis on all sides
    $graph->SetAxisStyle(AXSTYLE_BOXOUT);

    // Adjust the margins to fit the margin
    $graph->SetMargin(30,100,40,30);

    // Setup
    $graph->title->Set('Basic contour plot with multiple axis');
    $graph->title->SetFont(FF_ARIAL,FS_BOLD,12);

    // A simple contour plot with default arguments (e.g. 10 isobar lines)
    $cp = new ContourPlot($data,10,3);

    // Display the legend
    $cp->ShowLegend();

    $graph->Add($cp);

    // ... and send the graph back to the browser
    $graph->Stroke();

    ?>