impulsex3.php
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<?php // content="text/plain; charset=utf-8"
require_once ('jpgraph/jpgraph.php');
require_once ('jpgraph/jpgraph_scatter.php');
 
$numpoints=50;
$k=0.05;
 
// Create some data points
for($i=0; $i<$numpoints; ++$i) {
    $datay[$i]=exp(-$k*$i)*cos(2*M_PI/10*$i);
}
 
// A format callbakc function
function mycallback($l) {
    return sprintf("%02.2f",$l);
}
 
// Setup the basic parameters for the graph
$graph = new Graph(400,200);
$graph->SetScale("intlin");
$graph->SetShadow();
$graph->SetBox();
 
$graph->title->Set("Impuls Example 3");
$graph->title->SetFont(FF_FONT1,FS_BOLD);
 
// Set format callback for labels
$graph->yaxis->SetLabelFormatCallback("mycallback");
 
// Set X-axis at the minimum value of Y-axis (default will be at 0)
$graph->xaxis->SetPos("min");    // "min" will position the x-axis at the minimum value of the Y-axis
 
// Extend the margin for the labels on the Y-axis and reverse the direction
// of the ticks on the Y-axis
$graph->yaxis->SetLabelMargin(12);
$graph->xaxis->SetLabelMargin(6);
$graph->yaxis->SetTickSide(SIDE_LEFT);
$graph->xaxis->SetTickSide(SIDE_DOWN);
 
// Create a new impuls type scatter plot
$sp1 = new ScatterPlot($datay);
$sp1->mark->SetType(MARK_SQUARE);
$sp1->mark->SetFillColor("red");
$sp1->SetImpuls();
$sp1->SetColor("blue");
$sp1->SetWeight(1);
$sp1->mark->SetWidth(3);
 
$graph->Add($sp1);
 
$graph->Stroke();
 
?>