contour2_ex4.php

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    <?php // content="text/plain; charset=utf-8"

    require_once ('jpgraph/jpgraph.php');
    require_once ('jpgraph/jpgraph_contourf.php');

    // Setup some data to use for the contour
    $data = array(
        array (12,12,10,10),
        array (10,10,8,14),
        array (7,7,13,17),
        array (4,5,8,12),
        array (10,8,7,8));

    // create a basic graph as a container
    $graph = new Graph(300,300);
    $graph->SetMargin(30, 30, 40, 30);
    $graph->SetScale('intint');
    $graph->SetMarginColor('white');

    // Setup title of graph
    $graph->title->Set('Filled contour plot');
    $graph->title->SetFont(FF_VERDANA,FS_BOLD,12);

    $graph->subtitle->Set('(labels follows gradients)');
    $graph->subtitle->SetFont(FF_VERDANA,FS_ITALIC,10);

    // Create a new contour plot
    $cp = new FilledContourPlot($data,8);

    // Flip visually
    $cp->SetInvert();

    // Fill the contours
    $cp->SetFilled(true);

    // Display the labels
    $cp->ShowLabels(true,true);
    $cp->SetFont(FF_ARIAL,FS_BOLD,9);
    $cp->SetFontColor('black');

    // And add the plot to the graph
    $graph->Add($cp);

    // Send it back to the client
    $graph->stroke();

    ?>