windrose_bgimg_ex1.php

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    <?php
    require_once ('jpgraph/jpgraph.php');
    require_once ('jpgraph/jpgraph_windrose.php');
    require_once ('jpgraph/jpgraph_flags.php');

    // Data can be specified using both ordinal idex of axis as well
    // as the direction label
    $data2 = array(
        'vsv' => array(12,8,2,3),
        6 => array(5,4,4,5,4),
        );

    $se_CompassLbl = array('O','ONO','NO','NNO','N','NNV','NV','VNV','V','VSV','SV','SSV','S','SSO','SO','OSO');

    // Create a new small windrose graph
    $graph = new WindroseGraph(400,400);
    $graph->SetMargin(25,25,25,25);
    $graph->SetFrame();

    $graph->title->Set('Example with background flag');
    #$graph->title->SetFont(FF_VERA,FS_BOLD,14);

    //$graph->SetBackgroundImage('bkgimg.jpg',BGIMG_FILLFRAME);
    //$graph->SetBackgroundImageMix(90);
    $graph->SetBackgroundCFlag(28,BGIMG_FILLFRAME,15);

    $wp2 = new WindrosePlot($data2);
    $wp2->SetType(WINDROSE_TYPE16);
    $wp2->SetSize(0.55);
    $wp2->SetPos(0.5,0.5);
    $wp2->SetAntiAlias(false);

    $wp2->SetFont(FF_ARIAL,FS_BOLD,10);
    $wp2->SetFontColor('black');

    $wp2->SetCompassLabels($se_CompassLbl);
    $wp2->legend->SetMargin(20,5);

    $wp2->scale->SetZFont(FF_ARIAL,FS_NORMAL,8);
    $wp2->scale->SetFont(FF_ARIAL,FS_NORMAL,9);
    $wp2->scale->SetLabelFillColor('white','white');

    $wp2->SetRangeColors(array('green','yellow','red','brown'));

    $graph->Add($wp2);
    $graph->Stroke();
    ?>