contour2_ex3.php
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<?php // content="text/plain; charset=utf-8"
 
require_once ('jpgraph/jpgraph.php');
require_once ('jpgraph/jpgraph_contourf.php');
 
// Setup some data to use for the contour
$data = array(
    array (12,12,10,10),
    array (10,10,8,14),
    array (7,7,13,17),
    array (4,5,8,12),
    array (10,8,7,8));
 
// create a basic graph as a container
$graph = new Graph(300,300);
$graph->SetMargin(30, 30, 40, 30);
$graph->SetScale('intint');
$graph->SetMarginColor('white');
 
// Setup title of graph
$graph->title->Set('Filled contour plot');
$graph->title->SetFont(FF_VERDANA,FS_BOLD,12);
 
$graph->subtitle->Set('(Manual colors)');
$graph->subtitle->SetFont(FF_VERDANA,FS_ITALIC,10);
 
// Create a new contour plot with only 3 isobars
$cp = new FilledContourPlot($data,3);
 
// Specify the colors manually
$isobar_colors = array('lightgray','teal:1.3','orange','red');
$cp->SetIsobarColors($isobar_colors);
 
// Use only blue/red color schema
$cp->UseHighContrastColor(true);
 
// Flip visually 
$cp->SetInvert();
 
// Fill the contours
$cp->SetFilled(true);
 
// Display labels
$cp->ShowLabels(true);
 
// No lines
$cp->ShowLines(false);
 
// And add the plot to the graph
$graph->Add($cp);
 
// Send it back to the client
$graph->stroke();
 
?>