52 lines
1.5 KiB
PHP
52 lines
1.5 KiB
PHP
<?php // content="text/plain; charset=utf-8"
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// Contour plot example
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require_once ('jpgraph/jpgraph.php');
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require_once ('jpgraph/jpgraph_contour.php');
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$data = array(
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array (0.5,1.1,1.5,1,2.0,3,3,2,1,0.1),
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array (1.0,1.5,3.0,5,6.0,2,1,1.2,1,4),
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array (0.9,2.0,2.1,3,6.0,7,3,2,1,1.4),
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array (1.0,1.5,3.0,4,6.0,5,2,1.5,1,2),
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array (0.8,2.0,3.0,3,4.0,4,3,2.4,2,3),
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array (0.6,1.1,1.5,1,4.0,3.5,3,2,3,4),
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array (1.0,1.5,3.0,5,6.0,2,1,1.2,2.7,4),
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array (0.8,2.0,3.0,3,5.5,6,3,2,1,1.4),
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array (1.0,1.5,3.0,4,6.0,5,2,1,0.5,0.2));
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// Setup a basic graph context with some generous margins to be able
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// to fit the legend
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$graph = new Graph(500,380);
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$graph->SetMargin(40,140,60,40);
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// Enable antialias. Note with antiaaliasing only line weight=1 is supported.
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$graph->img->SetAntiAliasing();
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$graph->title->Set("Example of contour plot");
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$graph->title->SetFont(FF_ARIAL,FS_BOLD,14);
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// For contour plots it is custom to use a box style ofr the axis
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$graph->legend->SetPos(0.05,0.5,'right','center');
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$graph->SetScale('intint');
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$graph->SetAxisStyle(AXSTYLE_BOXOUT);
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$graph->xgrid->Show();
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$graph->ygrid->Show();
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// A simple contour plot with 19 isobars and flipped vertical range
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$cp = new ContourPlot($data,10,true);
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// Display the legend
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$cp->ShowLegend();
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// Invert the legend to th lowest isobar is on top
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$cp->Invertlegend();
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$graph->Add($cp);
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// ... and send the graph back to the browser
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$graph->Stroke();
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?>
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