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site/jpgraph/Examples/dateaxisex4.php 1.21 KB
8ec98c9f   Guillaume   MAJ
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  <?php // content="text/plain; charset=utf-8"
  require_once ('jpgraph/jpgraph.php');
  require_once ('jpgraph/jpgraph_line.php');
  require_once ('jpgraph/jpgraph_date.php');
  
  // Create a data set in range (50,70) and X-positions
  DEFINE('NDATAPOINTS',360);
  DEFINE('SAMPLERATE',240); 
  $start = time();
  $end = $start+NDATAPOINTS*SAMPLERATE;
  $data = array();
  $xdata = array();
  for( $i=0; $i < NDATAPOINTS; ++$i ) {
      $data[$i] = rand(50,70);
      $xdata[$i] = $start + $i * SAMPLERATE;
  }
  
  
  // Create the new graph
  $graph = new Graph(540,300);
  
  // Slightly larger than normal margins at the bottom to have room for
  // the x-axis labels
  $graph->SetMargin(40,40,30,130);
  
  // Fix the Y-scale to go between [0,100] and use date for the x-axis
  $graph->SetScale('datlin',0,100);
  $graph->title->Set("Example on Date scale");
  
  // Set the angle for the labels to 90 degrees
  $graph->xaxis->SetLabelAngle(90);
  
  // The automatic format string for dates can be overridden
  $graph->xaxis->scale->SetDateFormat('H:i');
  
  // Adjust the start/end to a specific alignment
  $graph->xaxis->scale->SetTimeAlign(MINADJ_10);
  
  $line = new LinePlot($data,$xdata);
  $line->SetLegend('Year 2005');
  $line->SetFillColor('lightblue@0.5');
  $graph->Add($line);
  $graph->Stroke();
  ?>