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site/jpgraph/Examples/interpolation-growth-log.php 944 Bytes
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_log.php');
  
  // Matrix size rxr
  $r = 10;
  
  // Max Interpolation factor
  $f = 5;
  
  for( $i=1; $i <= $f; ++$i ) {
  	$xdata[] = $i;
  	$ydata[] =  pow( $r*pow(2,($i-1)) - ( pow(2,$i) - 1 ),2);
  }
  
  $graph = new Graph(400,240);
  $graph->SetScale('intlog');
  $graph->SetMargin(50,50,20,30);
  $graph->SetFrame(false);
  $graph->SetBox(true,'black',2);
  $graph->SetMarginColor('white');
  $graph->SetColor('lightyellow@0.7');
  
  $graph->title->Set('Interpolation growth for size 10x10');
  $graph->title->SetFont(FF_FONT1,FS_BOLD);
  
  $graph->xaxis->SetTitle('Interpolation factor','center');
  $graph->xaxis->SetTitleMargin(10);
  
  $graph->SetAxisStyle(AXSTYLE_YBOXIN);
  $graph->xgrid->Show();
  
  $lp1 = new LinePlot($ydata,$xdata);
  $lp1->SetColor('darkred');
  $lp1->SetWeight(3);
  $graph->Add($lp1);
  
  $graph->Stroke();
  ?>