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site/jpgraph/Examples/y2synch2.php 1.56 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 toFahrenheit($aVal) {
      return round(($aVal*9/5)+32,2);
  }
  
  function toCelcius($aVal) {
      return round(($aVal-32)*5/9,2);
  }
  
  
  $datay =array(2,3,8,19,7,17,6,22);
  
  // Create the graph. 
  $graph = new Graph(400,280);
  
  // Slightly bigger margins than default to make room for titles
  $graph->SetMargin(50,60,40,45);
  $graph->SetMarginColor('white');
  
  
  // Setup the scales for X,Y and Y2 axis
  $graph->SetScale("textlin"); // X and Y axis
  $graph->SetY2Scale("lin"); // Y2 axis
  
  // Overall graph title
  $graph->title->Set('Synchronized Y & Y2 scales');
  $graph->title->SetFont(FF_ARIAL,FS_BOLD,12);
  
  // Title for X-axis
  $graph->xaxis->title->Set('Measurement');
  $graph->xaxis->title->SetMargin(5);
  $graph->xaxis->title->SetFont(FF_ARIAL,FS_NORMAL,11);
  
  // Create Y data set 
  $lplot = new BarPlot($datay);
  $graph->yaxis->title->Set('Celcius (C)');
  $graph->yaxis->title->SetMargin(5);
  $graph->yaxis->title->SetFont(FF_ARIAL,FS_NORMAL,11);
  // ... and add the plot to the Y-axis
  $graph->Add($lplot);
  
  // Create Y2 scale data set 
  $l2plot = new LinePlot($datay);
  $l2plot->SetWeight(0);
  $graph->y2axis->title->Set('Fahrenheit (F)');
  $graph->y2axis->title->SetMargin(5); // Some extra margin to clear labels
  $graph->y2axis->title->SetFont(FF_ARIAL,FS_NORMAL,11);
  $graph->y2axis->SetLabelFormatCallback('toFahrenheit');
  $graph->y2axis->SetColor('navy');
  
  // ... and add the plot to the Y2-axis
  $graph->AddY2($l2plot);
  
  $graph->Stroke();
  ?>