82 lines
2.1 KiB
PHP
82 lines
2.1 KiB
PHP
<?php
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include ("../jpgraph.php");
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include ("../jpgraph_scatter.php");
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// Each ballon is specificed by four values.
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// (X,Y,Size,Color)
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$data = array(
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array(1,12,10,'orange'),
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array(3,41,15,'red'),
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array(4,5,19,'lightblue'),
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array(5,70,22,'yellow')
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);
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// We need to create X,Y data vectors suitable for the
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// library from the above raw data.
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$n = count($data);
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for( $i=0; $i < $n; ++$i ) {
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$datax[$i] = $data[$i][0];
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$datay[$i] = $data[$i][1];
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// Create a faster lookup array so we don't have to search
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// for the correct values in the callback function
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$format[strval($datax[$i])][strval($datay[$i])] = array($data[$i][2],$data[$i][3]);
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}
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// Callback for markers
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// Must return array(width,border_color,fill_color,filename,imgscale)
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// If any of the returned values are '' then the
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// default value for that parameter will be used (possible empty)
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function FCallback($aYVal,$aXVal) {
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global $format;
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return array($format[strval($aXVal)][strval($aYVal)][0],'',
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$format[strval($aXVal)][strval($aYVal)][1],'','');
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}
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// Setup a basic graph
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$graph = new Graph(450,300,'auto');
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$graph->SetScale("intlin");
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$graph->SetMargin(40,40,40,40);
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$graph->SetMarginColor('wheat');
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$graph->title->Set("Example of ballon scatter plot with X,Y callback");
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$graph->title->SetFont(FF_ARIAL,FS_BOLD,12);
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$graph->title->SetMargin(10);
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// Use a lot of grace to get large scales since the ballon have
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// size and we don't want them to collide with the X-axis
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$graph->yaxis->scale->SetGrace(50,10);
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$graph->xaxis->scale->SetGrace(50,10);
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// Make sure X-axis as at the bottom of the graph and not at the default Y=0
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$graph->xaxis->SetPos('min');
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// Set X-scale to start at 0
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$graph->xscale->SetAutoMin(0);
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// Create the scatter plot
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$sp1 = new ScatterPlot($datay,$datax);
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$sp1->mark->SetType(MARK_FILLEDCIRCLE);
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// Uncomment the following two lines to display the values
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$sp1->value->Show();
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$sp1->value->SetFont(FF_FONT1,FS_BOLD);
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// Specify the callback
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$sp1->mark->SetCallbackYX("FCallback");
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// Add the scatter plot to the graph
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$graph->Add($sp1);
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// ... and send to browser
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$graph->Stroke();
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?>
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