basic_contourex05.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');

    // 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);

    // Flip the data around its center line
    $cp->SetInvert();

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

    $graph->Add($cp);

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

    ?>