example3.4.1.php

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    <?php // content="text/plain; charset=utf-8"
    require_once ('jpgraph/jpgraph.php');
    require_once ('jpgraph/jpgraph_line.php');

    // A function to return the Roman Numeral, given an integer
     function numberToRoman($aNum)
     {
         // Make sure that we only use the integer portion of the value
         $n = intval($aNum);
         $result = '';

         // Declare a lookup array that we will use to traverse the number:
         $lookup = array('M' => 1000, 'CM' => 900, 'D' => 500, 'CD' => 400,
         'C' => 100, 'XC' => 90, 'L' => 50, 'XL' => 40,
         'X' => 10, 'IX' => 9, 'V' => 5, 'IV' => 4, 'I' => 1);

         foreach ($lookup as $roman => $value)
         {
             // Determine the number of matches
             $matches = intval($n / $value);

             // Store that many characters
             $result .= str_repeat($roman, $matches);

             // Substract that from the number
             $n = $n % $value;
         }

         // The Roman numeral should be built, return it
         return $result;
    }

    function formatCallback($aVal) {
        return '('.numberToRoman($aVal).')';
    }

     // Some (random) data
    $ydata = array(11,3,8,12,5,1,9,13,5,7);

    // Size of the overall graph
    $width=350;
    $height=250;

    // Create the graph and set a scale.
    // These two calls are always required
    $graph = new Graph($width,$height);
    $graph->SetScale('intlin');
    $graph->SetShadow();

    // Setup margin and titles
    $graph->SetMargin(40,20,20,40);
    $graph->title->Set('Calls per operator');
    $graph->subtitle->Set('(March 12, 2008)');
    $graph->xaxis->title->Set('Operator');
    $graph->yaxis->title->Set('# of calls');

    $graph->yaxis->title->SetFont( FF_FONT1 , FS_BOLD );
    $graph->xaxis->title->SetFont( FF_FONT1 , FS_BOLD );

    $graph->yaxis->SetColor('blue');

    // Create the linear plot
    $lineplot=new LinePlot($ydata);
    $lineplot->SetColor( 'blue' );
    $lineplot->SetWeight( 2 );   // Two pixel wide
    $lineplot->mark->SetType(MARK_UTRIANGLE);
    $lineplot->mark->SetColor('blue');
    $lineplot->mark->SetFillColor('red');

    $lineplot->value->Show();
    $lineplot->value->SetFont(FF_ARIAL,FS_BOLD,10);
    $lineplot->value->SetColor('darkred');
    $lineplot->value->SetFormatCallback('formatCallback');

    // Add the plot to the graph
    $graph->Add($lineplot);

    // Display the graph
    $graph->Stroke();
    ?>