windrose_ex7.php

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

    $data = array(
        2 => array(1,15,7.5,2),
        5 => array(1,1,1.5,2),
        7 => array(1,2,10,3,2),
        9 => array(2,3,1,3,1,2),
        );

    // First create a new windrose graph with a title
    $graph = new WindroseGraph(400,450);
    $graph->title->Set('Windrose example 7');
    $graph->title->SetFont(FF_VERDANA,FS_BOLD,14);
    $graph->title->SetColor('navy');

    // Create the free windrose plot.
    $wp = new WindrosePlot($data);
    $wp->SetType(WINDROSE_TYPE16);

    // Add some "arbitrary" text to the center
    $wp->scale->SetZeroLabel("SOx\n8%%");

    // Localize the compass direction labels into Swedish
    // Note: The labels for data must now also match the exact
    // string for the compass directions.
    $se_CompassLbl = array('O','ONO','NO','NNO','N','NNV','NV','VNV',
                              'V','VSV','SV','SSV','S','SSO','SO','OSO');
    $wp->SetCompassLabels($se_CompassLbl);

    // Localize the "Calm" text into Swedish and make the circle
    // slightly bigger than default
    $se_calmtext = 'Lugnt';
    $wp->legend->SetCircleText($se_calmtext);
    $wp->legend->SetCircleRadius(20);

    // Adjust the displayed ranges
    $ranges = array(1,3,5,8,12,19,29);
    $wp->SetRanges($ranges);
    //$wp->SetAntiAlias(true);

    // Set the scale to always have max value of 30 with a step
    // size of 12.
    $wp->scale->Set(30,12);

    // Finally add it to the graph and send back to client
    $graph->Add($wp);
    $graph->Stroke();
    ?>