funcex2.php
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<?php // content="text/plain; charset=utf-8"
require_once ("jpgraph/jpgraph.php");
require_once ("jpgraph/jpgraph_line.php");
require_once ("jpgraph/jpgraph_utils.inc.php");
 
$f = new FuncGenerator('cos($i)','$i*$i*$i');
list($xdata,$ydata) = $f->E(-M_PI,M_PI,25);
 
$graph = new Graph(380,450);
$graph->SetScale("linlin");
$graph->SetShadow();
$graph->img->SetMargin(50,50,60,40);    
$graph->SetBox(true,'black',2);    
$graph->SetMarginColor('white');
$graph->SetColor('lightyellow');
$graph->SetAxisStyle(AXSTYLE_SIMPLE);
 
//$graph->xaxis->SetLabelFormat('%.1f');
 
$graph->title->Set("Function plot with marker");
$graph->title->SetFont(FF_FONT1,FS_BOLD);
$graph->subtitle->Set("(BOXOUT Axis style)");
$graph->subtitle->SetFont(FF_FONT1,FS_NORMAL);
 
$lp1 = new LinePlot($ydata,$xdata);
$lp1->mark->SetType(MARK_FILLEDCIRCLE);
$lp1->mark->SetFillColor("red");
$lp1->SetColor("blue");
 
$graph->Add($lp1);
$graph->Stroke();
?>