windrose_ex9.1.php

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    <?php
    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 = array(
        0 => array(3,2,1,2,2),
        4 => array(1,1,1.5,2),
        6 => array(1,1,1.5,2),
        12 => array(2,3,5,1),
    );

    $xpos1 = 0.26;
    $xpos2 = 0.74;
    $ypos1 = 0.5;
    $ypos2 = 0.9;

    // First create a new windrose graph with a title
    $graph = new WindroseGraph(650,350);
    $graph->title->Set('Interpretation of ordinal keys');
    $graph->title->SetFont(FF_VERDANA,FS_BOLD,14);
    $graph->title->SetColor('navy');

    // Create the first plot
    $wp1 = new WindrosePlot($data);
    $wp1->SetType(WINDROSE_TYPE16);

    // This is the default encoding
    $wp1->SetDataKeyEncoding(KEYENCODING_ANTICLOCKWISE);
    $wp1->legend->Hide();
    $wp1->SetPos($xpos1,$ypos1);
    $wp1->SetSize(0.5);

    // Create the second plot
    $wp2 = new WindrosePlot($data);
    $wp2->SetType(WINDROSE_TYPE16);
    $wp2->SetDataKeyEncoding(KEYENCODING_CLOCKWISE);
    $wp2->legend->Hide();
    $wp2->SetPos($xpos2,$ypos1);
    $wp2->SetSize(0.5);

    $txt1 = new Text('KEYENCODING_ANTICLOCKWISE');
    $txt1->SetFont(FF_COURIER,FS_BOLD,12);
    $txt1->SetPos($xpos1,$ypos2);
    $txt1->SetAlign('center','top');

    $txt2 = new Text('KEYENCODING_CLOCKWISE');
    $txt2->SetFont(FF_COURIER,FS_BOLD,12);
    $txt2->SetPos($xpos2,$ypos2);
    $txt2->SetAlign('center','top');

    // Finally add it to the graph and send back to the client
    $graph->Add($wp1);
    $graph->Add($txt1);

    $graph->Add($wp2);
    $graph->Add($txt2);

    $graph->Stroke();
    ?>