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<?php // A medium complex example of JpGraph // Note: You can create a graph in far fewwr lines of code if you are // willing to go with the defaults. This is an illustrative example of // some of the capabilities of JpGraph.
include ("../jpgraph.php"); include ("../jpgraph_line.php"); include ("../jpgraph_bar.php");
$month=array( "Jan","Feb","Mar","Apr","Maj","Jun","Jul","Aug","Sep","Okt","Nov","Dec");
// Create some datapoints $steps=100; for($i=0; $i<$steps; ++$i) { $databarx[]=sprintf("198%d %s",floor($i/12),$month[$i%12]); $datay[$i]=log(pow($i,$i/10)+1)*sin($i/15)+35; if( $i % 6 == 0 && $i<$steps-6) { $databary[]=abs(25*sin($i)+5); } else { $databary[]=0; } }
// New graph with a background image and drop shadow $graph = new Graph(450,300,"auto"); $graph->SetBackgroundImage("tiger_bkg.png",BGIMG_FILLFRAME); $graph->SetShadow();
// Use text X-scale so we can text labels on the X-axis $graph->SetScale("textlin");
// Y2-axis is linear $graph->SetY2Scale("lin");
// Color the two Y-axis to make them easier to associate // to the corresponding plot (we keep the axis black though) $graph->yaxis->SetColor("black","red"); $graph->y2axis->SetColor("black","orange");
// 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 (don't need TTF support) $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(0.03,0.5,"right","center");
// Display every 6:th tickmark $graph->xaxis->SetTextTickInterval(6);
// Label every 2:nd tick mark $graph->xaxis->SetTextLabelInterval(2);
// Setup the labels $graph->xaxis->SetTickLabels($databarx); $graph->xaxis->SetLabelAngle(90);
// Create a red line plot $p1 = new LinePlot($datay); $p1->SetColor("red"); $p1->SetLegend("Pressure");
// Create the bar plot $b1 = new BarPlot($databary); $b1->SetLegend("Temperature"); $b1->SetFillColor("orange"); $b1->SetAbsWidth(8);
// Drop shadow on bars adjust the default values a little bit $b1->SetShadow("steelblue",2,2);
// The order the plots are added determines who's ontop $graph->Add($p1); $graph->AddY2($b1);
// Finally output the image $graph->Stroke();
?>
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