[Sommaire] [Imprimer]

   1  <?php
   2  // A medium complex example of JpGraph
   3  // Note: You can create a graph in far fewwr lines of code if you are
   4  // willing to go with the defaults. This is an illustrative example of
   5  // some of the capabilities of JpGraph.
   6  
   7  include  ("../jpgraph.php");
   8  include  ("../jpgraph_line.php");
   9  include  ("../jpgraph_bar.php");
  10  
  11  $month=array(
  12  "Jan","Feb","Mar","Apr","Maj","Jun","Jul","Aug","Sep","Okt","Nov","Dec");
  13  
  14  // Create some datapoints 
  15  $steps=100;
  16  for($i=0; $i<$steps; ++$i) {
  17      $databarx[]=sprintf("198%d %s",floor($i/12),$month[$i%12]);
  18      $datay[$i]=log(pow($i,$i/10)+1)*sin($i/15)+35;
  19      if( $i % 6 == 0 && $i<$steps-6) {
  20          $databary[]=abs(25*sin($i)+5);
  21      }
  22      else {
  23          $databary[]=0;
  24      }
  25  }
  26  
  27  // New graph with a background image and drop shadow
  28  $graph = new Graph(450,300,"auto");
  29  $graph->SetBackgroundImage("tiger_bkg.png",BGIMG_FILLFRAME);
  30  $graph->SetShadow();
  31  
  32  // Use text X-scale so we can text labels on the X-axis
  33  $graph->SetScale("textlin");
  34  
  35  // Y2-axis is linear
  36  $graph->SetY2Scale("lin");
  37  
  38  // Color the two Y-axis to make them easier to associate
  39  // to the corresponding plot (we keep the axis black though)
  40  $graph->yaxis->SetColor("black","red");
  41  $graph->y2axis->SetColor("black","orange");
  42  
  43  // Set title and subtitle
  44  $graph->title->Set("Combined bar and line plot");
  45  $graph->subtitle->Set("100 data points, X-Scale: 'text'");
  46  
  47  // Use built in font (don't need TTF support)
  48  $graph->title->SetFont(FF_FONT1,FS_BOLD);
  49  
  50  // Make the margin around the plot a little bit bigger then default
  51  $graph->img->SetMargin(40,140,40,80);    
  52  
  53  // Slightly adjust the legend from it's default position in the
  54  // top right corner to middle right side
  55  $graph->legend->Pos(0.03,0.5,"right","center");
  56  
  57  // Display every 6:th tickmark
  58  $graph->xaxis->SetTextTickInterval(6);
  59  
  60  // Label every 2:nd tick mark
  61  $graph->xaxis->SetTextLabelInterval(2);
  62  
  63  // Setup the labels
  64  $graph->xaxis->SetTickLabels($databarx);
  65  $graph->xaxis->SetLabelAngle(90);
  66  
  67  // Create a red line plot
  68  $p1 = new LinePlot($datay);
  69  $p1->SetColor("red");
  70  $p1->SetLegend("Pressure");
  71  
  72  // Create the bar plot
  73  $b1 = new BarPlot($databary);
  74  $b1->SetLegend("Temperature");
  75  $b1->SetFillColor("orange");
  76  $b1->SetAbsWidth(8);
  77  
  78  // Drop shadow on bars adjust the default values a little bit
  79  $b1->SetShadow("steelblue",2,2);
  80  
  81  // The order the plots are added determines who's ontop
  82  $graph->Add($p1);
  83  $graph->AddY2($b1);
  84  
  85  // Finally output the  image
  86  $graph->Stroke();
  87  
  88  ?>
  89  
  90