pushpinex1.php

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    <?php // content="text/plain; charset=utf-8"
    require_once ("jpgraph/jpgraph.php");
    require_once ("jpgraph/jpgraph_scatter.php");

    DEFINE('WORLDMAP','worldmap1.jpg');

    function markCallback($y,$x) {
        // Return array width
        // width,color,fill color, marker filename, imgscale
        // any value can be false, in that case the default value will
        // be used.
        // We only make one pushpin another color
        if( $x == 54 )
        return array(false,false,false,'red',0.8);
        else
        return array(false,false,false,'green',0.8);
    }

    // Data arrays
    $datax = array(10,20,30,40,54,60,70,80);
    $datay = array(12,23,65,18,84,28,86,44);

    // Setup the graph
    $graph = new Graph(400,270);

    // We add a small 1pixel left,right,bottom margin so the plot area
    // doesn't cover the frame around the graph.
    $graph->img->SetMargin(1,1,1,1);
    $graph->SetScale('linlin',0,100,0,100);

    // We don't want any axis to be shown
    $graph->xaxis->Hide();
    $graph->yaxis->Hide();

    // Use a worldmap as the background and let it fill the plot area
    $graph->SetBackgroundImage(WORLDMAP,BGIMG_FILLPLOT);

    // Setup a nice title with a striped bevel background
    $graph->title->Set("Pushpin graph");
    $graph->title->SetFont(FF_ARIAL,FS_BOLD,16);
    $graph->title->SetColor('white');
    $graph->SetTitleBackground('darkgreen',TITLEBKG_STYLE1,TITLEBKG_FRAME_BEVEL);
    $graph->SetTitleBackgroundFillStyle(TITLEBKG_FILLSTYLE_HSTRIPED,'blue','darkgreen');

    // Finally create the scatterplot
    $sp = new ScatterPlot($datay,$datax);

    // We want the markers to be an image
    $sp->mark->SetType(MARK_IMG_PUSHPIN,'blue',0.6);

    // Install the Y-X callback for the markers
    $sp->mark->SetCallbackYX('markCallback');

    // ...  and add it to the graph
    $graph->Add($sp);

    // .. and output to browser
    $graph->Stroke();

    ?>