windrose_ex3.php

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

    // Data can be specified using both ordinal index of the axis
    // as well as the direction label
    $data[0] = array(
        0 => array(1,1,2.5,4),
        1 => array(3,4,1,4),
        3 => array(2,7,4,4,3),
        5 => array(2,7,1,2));

    $data[1] = array(
        "n" => array(1,1,2.5,4),
        "ssw" => array(3,4,1,4),
        "se" => array(2,7,4,4,3));

    // Store the position and size data for each plot in an
    // array to make it easier to create multiple plots.
    // The format choosen for the layout data is
    // (type,x-pos,y-pos,size, z-circle size)
    $layout = array(
        array(WINDROSE_TYPE8,0.25,0.55,0.4,0.25),
        array(WINDROSE_TYPE16,0.75,0.55,0.4,0.25));

    $legendtxt = array('(m/s) Station 7','(m/s) Station 12');

    // First create a new windrose graph with a dropshadow
    $graph = new WindroseGraph(600,350);
    $graph->SetShadow('darkgray');

    // Setup titles
    $graph->title->Set('Windrose example 3');
    $graph->title->SetFont(FF_VERDANA,FS_BOLD,12);
    $graph->title->SetColor('navy');
    $graph->subtitle->Set('(Multiple plots in the same graph)');
    $graph->subtitle->SetFont(FF_VERDANA,FS_NORMAL,9);
    $graph->subtitle->SetColor('navy');

    // Create the two windrose plots.
    for( $i=0; $i < count($data); ++$i ) {
        $wp[$i] = new WindrosePlot($data[$i]);

        // Make it have 8 compass direction
        $wp[$i]->SetType($layout[$i][0]);

        // Adjust the font and font color for scale labels
        $wp[$i]->scale->SetFont(FF_TIMES,FS_NORMAL,10);
        $wp[$i]->scale->SetFontColor('navy');

        // Set the position of the plot
        $wp[$i]->SetPos($layout[$i][1],$layout[$i][2]);

        // Set the diameter for the plot to 30% of the width of the graph pixels
        $wp[$i]->SetSize($layout[$i][3]);

        // Set the size of the innermost center circle to 30% of the plot size
        $wp[$i]->SetZCircleSize($layout[$i][4]);

        // Adjust the font and font color for compass directions
        $wp[$i]->SetFont(FF_ARIAL,FS_NORMAL,10);
        $wp[$i]->SetFontColor('darkgreen');

        // Add legend text
        $wp[$i]->legend->SetText($legendtxt[$i]);

        $graph->Add($wp[$i]);
    }

    // Send the graph to the browser
    $graph->Stroke();
    ?>