$data = array(18, 40, 70, 90, 42, 66);
$n = count($data);
for ($i = 0; $i < $n; ++$i) {
$targets[$i] = "#{$i}";
$alts[$i] = "Data point #{$i}";
}
$graph = new RadarGraph(300, 280);
$graph->title->Set('Radar with marks');
$graph->title->SetFont(FF_VERDANA, FS_BOLD, 12);
$graph->title->SetMargin(10);
$graph->SetTitles($titles);
$graph->SetCenter(0.5, 0.55);
$graph->HideTickMarks();
$graph->SetColor('lightgreen@0.7');
$graph->axis->SetColor('darkgray');
$graph->grid->SetColor('darkgray');
$graph->grid->Show();
$graph->axis->title->SetFont(FF_ARIAL, FS_NORMAL, 12);
$graph->axis->title->SetMargin(5);
$graph->SetGridDepth(DEPTH_BACK);
$graph->SetSize(0.6);
$plot = new RadarPlot($data);
$plot->SetColor('red@0.2');
$plot->SetLineWeight(2);
$plot->SetFillColor('red@0.7');
$plot->mark->SetType(MARK_IMG_DIAMOND, 'red', 0.6);
$plot->mark->SetFillColor('darkred');
$plot->SetCSIMTargets($targets, $alts);
$graph->Add($plot);
$graph->StrokeCSIM();