91 lines
2.4 KiB
PHP
91 lines
2.4 KiB
PHP
<?php
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// A medium complex example of JpGraph
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// Note: You can create a graph in far fewwr lines of code if you are
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// willing to go with the defaults. This is an illustrative example of
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// some of the capabilities of JpGraph.
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include ("../jpgraph.php");
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include ("../jpgraph_line.php");
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include ("../jpgraph_bar.php");
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$month=array(
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"Jan","Feb","Mar","Apr","Maj","Jun","Jul","Aug","Sep","Okt","Nov","Dec");
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// Create some datapoints
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$steps=100;
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for($i=0; $i<$steps; ++$i) {
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$databarx[]=sprintf("198%d %s",floor($i/12),$month[$i%12]);
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$datay[$i]=log(pow($i,$i/10)+1)*sin($i/15)+35;
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if( $i % 6 == 0 && $i<$steps-6) {
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$databary[]=abs(25*sin($i)+5);
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}
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else {
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$databary[]=0;
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}
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}
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// New graph with a background image and drop shadow
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$graph = new Graph(450,300,"auto");
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$graph->SetBackgroundImage("tiger_bkg.png",BGIMG_FILLFRAME);
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$graph->SetShadow();
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// Use text X-scale so we can text labels on the X-axis
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$graph->SetScale("textlin");
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// Y2-axis is linear
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$graph->SetY2Scale("lin");
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// Color the two Y-axis to make them easier to associate
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// to the corresponding plot (we keep the axis black though)
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$graph->yaxis->SetColor("black","red");
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$graph->y2axis->SetColor("black","orange");
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// Set title and subtitle
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$graph->title->Set("Combined bar and line plot");
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$graph->subtitle->Set("100 data points, X-Scale: 'text'");
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// Use built in font (don't need TTF support)
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$graph->title->SetFont(FF_FONT1,FS_BOLD);
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// Make the margin around the plot a little bit bigger then default
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$graph->img->SetMargin(40,140,40,80);
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// Slightly adjust the legend from it's default position in the
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// top right corner to middle right side
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$graph->legend->Pos(0.03,0.5,"right","center");
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// Display every 6:th tickmark
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$graph->xaxis->SetTextTickInterval(6);
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// Label every 2:nd tick mark
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$graph->xaxis->SetTextLabelInterval(2);
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// Setup the labels
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$graph->xaxis->SetTickLabels($databarx);
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$graph->xaxis->SetLabelAngle(90);
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// Create a red line plot
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$p1 = new LinePlot($datay);
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$p1->SetColor("red");
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$p1->SetLegend("Pressure");
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// Create the bar plot
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$b1 = new BarPlot($databary);
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$b1->SetLegend("Temperature");
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$b1->SetFillColor("orange");
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$b1->SetAbsWidth(8);
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// Drop shadow on bars adjust the default values a little bit
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$b1->SetShadow("steelblue",2,2);
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// The order the plots are added determines who's ontop
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$graph->Add($p1);
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$graph->AddY2($b1);
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// Finally output the image
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$graph->Stroke();
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?>
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