windrose_ex8.1.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(
        '45.9' => array(3,2,1,2,2),
        355 => array(1,1,1.5,2),
        180 => array(1,1,1.5,2),
        150 => array(1,2,1,3),
        'S' => array(2,3,5,1),
        );

    // Add some labels for  afew of the directions
    $labels = array(355=>"At\nHome base",180=>"Probe\n123",150=>"Power\nplant");

    // Define the color,weight and style of some individual radial grid lines.
    $axiscolors = array(355=>"red");
    $axisweights = array(355=>8);
    $axisstyles = array(355=>'solid',150=>'solid');

    // First create a new windrose graph with a title
    $graph = new WindroseGraph(400,460);
    $graph->title->Set('Adding label backgrounds');
    $graph->title->SetFont(FF_VERDANA,FS_BOLD,14);
    $graph->title->SetColor('navy');

    // Create the free windrose plot.
    $wp = new WindrosePlot($data);
    $wp->SetType(WINDROSE_TYPEFREE);
    $wp->scale->SetLabelFillColor('lightblue','black');

    // Specify colors weights and style for the radial gridlines
    $wp->SetRadialColors($axiscolors);
    $wp->SetRadialWeights($axisweights);
    $wp->SetRadialStyles($axisstyles);

    // Add a few labels
    $wp->SetLabels($labels);

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

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