<?php // content="text/plain; charset=utf-8"
require_once('jpgraph/jpgraph.php');
require_once('jpgraph/jpgraph_matrix.php');
require_once('jpgraph/jpgraph_plotline.php');


$data = array(
        array(0,null,2,3,4,5,6,7,8,9,10,8,6,4,2),
        array(10,9,8,7,6,5,4,3,2,1,0,8,5,9,2),
        array(0,1,2,3,4,5,6,7,8,9,10,2,4,5,7),
        array(10,9,8,17,6,5,4,3,2,1,0,8,6,4,2),
        array(0,1,2,3,4,4,9,7,8,9,10,3,2,7,2),
        array(8,1,2,3,4,8,3,7,8,9,10,5,3,9,1),
        array(10,3,5,7,6,5,4,3,12,1,0,6,5,10,2),
        array(10,9,8,7,6,5,4,3,2,1,NULL,8,6,4,2),
);

$nx = count($data[0]);
$ny = count($data);


for($i=0; $i < $nx; ++$i ) {
    $collabels[$i] = sprintf('column label: %02d',$i);

}
for($i=0; $i < $ny; ++$i ) {
    $rowlabels[$i] = sprintf('row label: %02d',$i);
 }

// Setup a nasic matrix graph
$graph = new MatrixGraph(400,350);

$graph->SetBackgroundGradient('lightsteelblue:0.8','lightsteelblue:0.3');
$graph->title->Set('Matrix with lines');
$graph->title->SetFont(FF_ARIAL,FS_BOLD,18);
$graph->title->SetColor('white');

// Create two lines to add as markers
$l1 = new PlotLine(VERTICAL, 5, 'lightgray:1.5', 4);
$l2 = new PlotLine(HORIZONTAL, 3, 'lightgray:1.5', 4);

// Create one matrix plot
$mp = new MatrixPlot($data,1);
$mp->SetModuleSize(13,15);
$mp->SetCenterPos(0.35,0.6);
$mp->colormap->SetNullColor('gray');

// Add lines
$mp->AddLine($l1);
$mp->AddLine($l2);
// this could also be done as
// $mp->AddLine(array($l1,$l2));

// Setup column lablels
$mp->collabel->Set($collabels);
$mp->collabel->SetSide('top');
$mp->collabel->SetFont(FF_ARIAL,FS_NORMAL,8);
$mp->collabel->SetFontColor('lightgray');

// Setup row lablels
$mp->rowlabel->Set($rowlabels);
$mp->rowlabel->SetSide('right');
$mp->rowlabel->SetFont(FF_ARIAL,FS_NORMAL,8);
$mp->rowlabel->SetFontColor('lightgray');

// Move the legend more to the right
$mp->legend->SetMargin(90);
$mp->legend->SetColor('white');
$mp->legend->SetFont(FF_VERDANA,FS_BOLD,10);

$graph->Add($mp);
$graph->Stroke();

?>