source: trunk/xgraph/jpgraph/Examples/windrose_bgimg_ex1.php@ 42

<?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();
?>