[Sommaire] [Imprimer]

   1  <?php
   2  //
   3  // Basic example on how to use custom tickmark feature to have a label
   4  // at the start of each month.
   5  //
   6  include  ("../jpgraph.php");
   7  include  ("../jpgraph_line.php");
   8  include  ("../jpgraph_utils.inc.php");
   9  
  10  // 
  11  // Create some random data for the plot. We use the current time for the
  12  // first X-position
  13  //
  14  $f = new FuncGenerator('cos($x)+1.5*cos(2*$x)');
  15  list($datax,$datay) = $f->E(0,10);
  16  
  17  // Now get labels at 1/2 PI intervall
  18  $tickPositions = array();
  19  $tickLabels = array();
  20  $tickPositions[0] = 0;
  21  $tickLabels[0] = '0';
  22  for($i=1; $i/2*M_PI < 11 ; ++$i ) {
  23      $tickPositions[$i] = $i/2*M_PI;
  24      if( $i % 2 )
  25      $tickLabels[$i] = $i.'/2'.SymChar::Get('pi');
  26      else
  27      $tickLabels[$i] = ($i/2).SymChar::Get('pi');
  28  }
  29  
  30  $n = count($datax);
  31  $xmin = $datax[0];
  32  $xmax = $datax[$n-1];
  33  
  34  //
  35  // The code to setup a very basic graph
  36  //
  37  $graph = new Graph(400,200);
  38  
  39  //
  40  // We use an integer scale on the X-axis since the positions on the X axis
  41  // are assumed to be UNI timestamps
  42  $graph->SetScale('linlin',0,0,$xmin,$xmax);
  43  $graph->title->Set('Example with manual tick labels');
  44  $graph->title->SetFont(FF_ARIAL,FS_NORMAL,12);
  45  
  46  //
  47  // Make sure that the X-axis is always at the bottom of the scale
  48  // (By default the X-axis is alwys positioned at Y=0 so if the scale
  49  // doesn't happen to include 0 the axis will not be shown)
  50  $graph->xaxis->SetPos('min');
  51  
  52  // Now set the tic positions
  53  $graph->xaxis->SetMajTickPositions($tickPositions,$tickLabels);
  54  
  55  // Use Times font
  56  $graph->xaxis->SetFont(FF_TIMES,FS_NORMAL,10);
  57  $graph->yaxis->SetFont(FF_TIMES,FS_NORMAL,10);
  58  
  59  // Add a X-grid
  60  $graph->xgrid->Show();
  61  
  62  // Create the plot line
  63  $p1 = new LinePlot($datay,$datax);
  64  $p1->SetColor('teal');
  65  $graph->Add($p1);
  66  
  67  // Output graph
  68  $graph->Stroke();
  69  
  70  ?>
  71  
  72