source: trunk/xgraph/jpgraph/Examples/polarex10.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(5,1,20,5,30,25,40,60,
              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,
              150,25,160,5,175,1);
$n = count($data);
/*
for($i=0; $i < $n; $i+=2 ) {
    $data[$n+$i] = 360-$data[$i];
    $data[$n+$i+1] = $data[$i+1];
}
*/
$graph = new PolarGraph(350,480);
$graph->SetScale('log',100);
$graph->SetType(POLAR_360);

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

// Show both major and minor grid lines
$graph->axis->ShowGrid(true,true);

// Set color for gradient lines
$graph->axis->SetGridColor('lightblue:0.9','lightblue:0.9','lightblue:0.9');

// Set label and axis colors
$graph->axis->SetColor('black','navy','darkred');

// Draw the ticks on the bottom side of the radius axis
$graph->axis->SetTickSide(SIDE_DOWN);

// Increase the margin for the labels since we changed the
// side of the ticks.
$graph->axis->SetLabelMargin(6);

// Change fonts
$graph->axis->SetFont(FF_ARIAL,FS_NORMAL,8);
$graph->axis->SetAngleFont(FF_ARIAL,FS_NORMAL,8);


// Setup graph title
$graph->title->Set('Polar plot #10');
$graph->title->SetFont(FF_ARIAL,FS_BOLD,16);
$graph->title->SetColor('navy');

// Setup tab title
$graph->tabtitle->Set('Microphone #1');
$graph->tabtitle->SetColor('brown:0.5','lightyellow');


$p = new PolarPlot($data);
$p->SetFillColor('lightblue@0.5');
$p->mark->SetType(MARK_SQUARE);

$graph->Add($p);

$graph->Stroke();

?>