if ($i % 10 == 0) {
$databarx[] = $i;
$databary[] = $datay[$i] / 2;
}
}
// new Graph\Graph with a background image and drop shadow
$graph = new Graph\Graph(450, 300);
$graph->img->SetMargin(40, 180, 40, 40);
$graph->SetBackgroundImage("tiger_bkg.png", BGIMG_FILLFRAME);
//$graph->img->SetAntiAliasing();
$graph->SetScale("intlin");
$graph->SetShadow();
$graph->title->Set("Combined bar and line plot");
$graph->subtitle->Set("(\"center\" aligned bars)");
// Use built in font
$graph->title->SetFont(FF_FONT1, FS_BOLD);
// Slightly adjust the legend from it's default position in the
// top right corner.
$graph->legend->Pos(0.05, 0.5, "right", "center");
// Create the first line
$p1 = new Plot\LinePlot($datay, $datax);
$p1->SetWeight(1);
$p1->SetColor("red");
$p1->SetLegend("Triumph Tiger -98");
$graph->Add($p1);
$b1 = new Plot\BarPlot($databary, $databarx);
$b1->SetAbsWidth(10);
$b1->SetAlign("center");
$b1->SetShadow();
$graph->Add($b1);
$graph->Stroke();
$graph->SetScale("textlin");
// Set title and subtitle
$graph->title->Set("Combined bar and line plot");
$graph->subtitle->Set("100 data points, X-Scale: 'text'");
// Use built in font
$graph->title->SetFont(FF_FONT1, FS_BOLD);
// Make the margin around the plot a little bit bigger
// then default
$graph->img->SetMargin(40, 140, 40, 80);
// Slightly adjust the legend from it's default position in the
// top right corner to middle right side
$graph->legend->Pos(0.05, 0.5, "right", "center");
// Display every 10:th datalabel
$graph->xaxis->SetTextTickInterval(6);
$graph->xaxis->SetTextLabelInterval(2);
$graph->xaxis->SetTickLabels($databarx);
$graph->xaxis->SetLabelAngle(90);
// Create a red line plot
$p1 = new Plot\LinePlot($datay);
$p1->SetColor("red");
$p1->SetLegend("Pressure");
// Create the bar plot
$b1 = new Plot\BarPlot($databary);
$b1->SetLegend("Temperature");
$b1->SetAbsWidth(6);
$b1->SetShadow();
// The order the plots are added determines who's ontop
$graph->Add($p1);
$graph->Add($b1);
// Finally output the image
$graph->Stroke();
