windrose_ex9.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(
        'E' => array(3,2,1,2,2),
        'N' => array(1,1,1.5,2),
        'nw' => array(1,1,1.5,2),
        'S' => array(2,3,5,1),
        );

    // Define the color,weight and style of some individual radial
    // grid lines. Axis can be specified either by their (localized)
    // label or by their index.
    // Note; Depending on how many axis you have in the plot the
    // index will vary between 0..n where n is the number of
    // compass directions.
    $axiscolors = array('nw'=>'brown');
    $axisweights = array('nw'=>8);  // Could also be specified as 6 => 8
    $axisstyles = array('nw'=>'solid');

    // First create a new windrose graph with a title
    $graph = new WindroseGraph(400,500);
    $graph->title->Set('Windrose example 9');
    $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);

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

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

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