Version 1.12

onyx2/include/jpgraph/Examples/balloonex1.php

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+<?php
+// $Id: balloonex1.php,v 1.5 2002/12/15 16:08:51 aditus Exp $
+include ("../jpgraph.php");
+include ("../jpgraph_scatter.php");
+
+// Some data
+$datax = array(1,2,3,4,5,6,7,8);
+$datay = array(12,23,95,18,65,28,86,44);
+// Callback for markers
+// Must return array(width,color,fill_color)
+// If any of the returned values are "" then the
+// default value for that parameter will be used.
+function FCallback($aVal) {
+    // This callback will adjust the fill color and size of
+    // the datapoint according to the data value according to
+    if( $aVal < 30 ) $c = "blue";
+    elseif( $aVal < 70 ) $c = "green";
+    else $c="red";
+    return array(floor($aVal/3),"",$c);
+}
+
+// Setup a basic graph
+$graph = new Graph(400,300,'auto');
+$graph->SetScale("linlin");
+$graph->img->SetMargin(40,100,40,40);		
+$graph->SetShadow();
+$graph->title->Set("Example of ballon scatter plot");
+// Use a lot of grace to get large scales
+$graph->yaxis->scale->SetGrace(50,10);
+
+// Make sure X-axis as at the bottom of the graph
+$graph->xaxis->SetPos('min');
+
+// Create the scatter plot
+$sp1 = new ScatterPlot($datay,$datax);
+$sp1->mark->SetType(MARK_FILLEDCIRCLE);
+
+// Uncomment the following two lines to display the values
+$sp1->value->Show();
+$sp1->value->SetFont(FF_FONT1,FS_BOLD);
+
+// Specify the callback
+$sp1->mark->SetCallback("FCallback");
+
+// Setup the legend for plot
+$sp1->SetLegend('Year 2002');
+
+// Add the scatter plot to the graph
+$graph->Add($sp1);
+
+// ... and send to browser
+$graph->Stroke();
+
+?>
+
+