[Sommaire] [Imprimer]

   1  <?php
   2  include  ("../jpgraph.php");
   3  include  ("../jpgraph_line.php");
   4  
   5  // Callback to negate the argument
   6  function _cb_negate($aVal) {
   7      return round(-$aVal);
   8  }
   9  
  10  // A fake depth curve
  11  $ydata = array(0,1,4,5,8,9,10,14,16,16,16,18,20,20,20,22,22.5,22,19,19,15,15,15,15,10,10,10,6,5,5,5,4,4,2,1,0);
  12  
  13  // Negate all data
  14  $n = count($ydata);
  15  for($i=0; $i<$n; ++$i) {
  16      $ydata[$i] = round(-$ydata[$i]);
  17  }
  18  
  19  // Basic graph setup
  20  $graph = new Graph(400,300,"auto");
  21  $graph->SetScale("linlin");
  22  $graph->img->SetMargin(50,50,60,40);    
  23  $graph->SetMarginColor('darkblue');
  24  $graph->SetColor('darkblue');
  25  $graph->SetAxisStyle(AXSTYLE_BOXOUT);
  26  
  27  $graph->title->Set("Depth curve. Dive #2");
  28  $graph->title->SetFont(FF_FONT1,FS_BOLD);
  29  $graph->title->SetColor("white");
  30  
  31  $graph->subtitle->Set("(Negated Y-axis)");
  32  $graph->subtitle->SetFont(FF_FONT1,FS_NORMAL);
  33  $graph->subtitle->SetColor("white");
  34  
  35  // Setup axis
  36  $graph->yaxis->SetLabelFormatCallback("_cb_negate");
  37  $graph->xaxis->SetColor("lightblue","white");
  38  $graph->yaxis->SetColor("lightblue","white");
  39  $graph->ygrid->SetColor("blue");
  40  
  41  
  42  $lp1 = new LinePlot($ydata);
  43  $lp1->SetColor("yellow");
  44  $lp1->SetWeight(2);
  45  
  46  
  47  $graph->Add($lp1);
  48  $graph->Stroke();
  49  ?>
  50  
  51