source: trunk/xgraph/jpgraph/Examples/polarex7-2.php

<?php // content="text/plain; charset=utf-8"
// A simple Polar graph,

require_once ('jpgraph/jpgraph.php');
require_once ('jpgraph/jpgraph_polar.php');


$data = array(0,1,30,2,30,25,40,60,
              50,110,60,160,70,210,75,230,80,260,85,370,
              90,480,
              95,370,100,260,105,230,
              110,210,120,160,130,110,140,60,
              150,25,150,2,180,1);

$n = count($data);
for($i=0; $i < $n; $i+=2 ) {
    $data[$n+$i] = 360-$data[$i];
    $data[$n+$i+1] = $data[$i+1];
}


$graph = new PolarGraph(300,400);
$graph->SetScale('log',100);
$graph->SetType(POLAR_360);
$graph->SetPlotSize(220,300);

// Hide frame around graph (by setting width=0)
$graph->SetFrame(true,'white',1);

$graph->SetBackgroundGradient('blue:1.3','brown:1.4',GRAD_MIDHOR,BGRAD_PLOT);

// Set color for gradient lines
$graph->axis->SetGridColor('gray','gray','gray');

$graph->title->Set('Polar plot #7-2');
$graph->title->SetFont(FF_ARIAL,FS_BOLD,16);
$graph->title->SetColor('navy');

// Adjust legen box position and color
$graph->legend->SetColor('navy','darkgray');
$graph->legend->SetFillColor('white');
$graph->legend->SetShadow('darkgray@0.5',5);

$p = new PolarPlot($data);
$p->SetFillColor('yellow@0.6');
$p->mark->SetType(MARK_SQUARE);
$p->SetLegend("Mirophone #1\n(No amps)");

$graph->Add($p);

$graph->Stroke();

?>