<?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();
  
  ?>