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site/jpgraph/Examples/sunspotsex5.php 1.45 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_bar.php');
  
  function readsunspotdata($aFile, &$aYears, &$aSunspots) {
      $lines = @file($aFile,FILE_IGNORE_NEW_LINES|FILE_SKIP_EMPTY_LINES);
      if( $lines === false ) {
          throw new JpGraphException('Can not read sunspot data file.');
      }
      foreach( $lines as $line => $datarow ) {
          $split = preg_split('/[\s]+/',$datarow);
          $aYears[] = substr(trim($split[0]),0,4);
          $aSunspots[] = trim($split[1]);
      }
  }
  
  $year = array();
  $ydata = array();
  readsunspotdata('yearssn.txt',$year,$ydata);
  
  function year_callback($aLabel) {
      return 1700+(int)$aLabel;
  }
  
   // Width and height of the graph
  $width = 600; $height = 200;
  
  // Create a graph instance
  $graph = new Graph($width,$height);
  
  // Specify what scale we want to use,
  // int = integer scale for the X-axis
  // int = integer scale for the Y-axis
  $graph->SetScale('intint');
  
  // Setup a title for the graph
  $graph->title->Set('Sunspot example');
  
  // Setup titles and X-axis labels
  $graph->xaxis->title->Set('(year from 1701)');
  $graph->xaxis->SetLabelFormatCallback('year_callback');
  
  // Setup Y-axis title
  $graph->yaxis->title->Set('(# sunspots)');
  
  // Create the linear plot
  $lineplot=new LinePlot($ydata);
  $lineplot->SetFillColor('orange@0.5');
  
  // Add the plot to the graph
  $graph->Add($lineplot);
  
  // Display the graph
  $graph->Stroke();
  
  ?>