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site/jpgraph/Examples/manualtickex1.php 1.92 KB
8ec98c9f   Guillaume   MAJ
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  <?php // content="text/plain; charset=utf-8"
  //
  // Basic example on how to use custom tickmark feature to have a label
  // at the start of each month.
  //
  require_once ('jpgraph/jpgraph.php');
  require_once ('jpgraph/jpgraph_line.php');
  require_once ('jpgraph/jpgraph_utils.inc.php');
  
  //
  // Create some random data for the plot. We use the current time for the
  // first X-position
  //
  $datay = array();
  $datax = array();
  $ts = time();
  $n=15; // Number of data points
  for($i=0; $i < $n; ++$i ) {
      $datax[$i] = $ts+$i*700000;
      $datay[$i] = rand(5,60);
  }
  
  // Now get labels at the start of each month
  $dateUtils = new DateScaleUtils();
  list($tickPositions,$minTickPositions) = $dateUtils->GetTicks($datax);
  
  // We add some grace to the end of the X-axis scale so that the first and last
  // data point isn't exactly at the very end or beginning of the scale
  $grace = 400000;
  $xmin = $datax[0]-$grace;
  $xmax = $datax[$n-1]+$grace;
  
  //
  // The code to setup a very basic graph
  //
  $graph = new Graph(400,200);
  $graph->clearTheme();
  
  //
  // We use an integer scale on the X-axis since the positions on the X axis
  // are assumed to be UNI timestamps
  $graph->SetScale('intlin',0,0,$xmin,$xmax);
  $graph->title->Set('Basic example with manual ticks');
  $graph->title->SetFont(FF_ARIAL,FS_NORMAL,12);
  
  //
  // Make sure that the X-axis is always at the bottom of the scale
  // (By default the X-axis is alwys positioned at Y=0 so if the scale
  // doesn't happen to include 0 the axis will not be shown)
  $graph->xaxis->SetPos('min');
  
  // Now set the tic positions
  $graph->xaxis->SetTickPositions($tickPositions,$minTickPositions);
  
  // The labels should be formatted at dates with "Year-month"
  $graph->xaxis->SetLabelFormatString('My',true);
  
  // Use Ariel font
  $graph->xaxis->SetFont(FF_ARIAL,FS_NORMAL,9);
  
  // Add a X-grid
  $graph->xgrid->Show();
  
  // Create the plot line
  $p1 = new LinePlot($datay,$datax);
  $p1->SetColor('teal');
  $graph->Add($p1);
  
  // Output graph
  $graph->Stroke();
  
  ?>