prepaccdata_example.php

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

    //Create some test data
    $xdata = array();
    $ydata = array();

    // Timestamps - 2h (=7200s) apart starting
    $sampling = 7200;
    $n = 50; // data points
    for($i=0; $i < $n; ++$i ) {
        $xdata[$i] = time() + $i * $sampling;
        $ydata[0][$i] = rand(12,15);
        $ydata[1][$i] = rand(100,155);
        $ydata[2][$i] = rand(20,30);
    }

    function formatDate(&$aVal) {
        $aVal = date('Y-m-d H:i',$aVal);
    }

    // Apply this format to all time values in the data to prepare it to be display
    array_walk($xdata,'formatDate');

    // Create the graph.
    $graph  = new Graph(600, 350);
    $graph->title->Set('Accumulated values with specified X-axis scale');
    $graph->SetScale('textlin');

    // Setup margin color
    $graph->SetMarginColor('green@0.95');

    // Adjust the margin to make room for the X-labels
    $graph->SetMargin(40,30,40,120);

    // Turn the tick marks out from the plot area
    $graph->xaxis->SetTickSide(SIDE_BOTTOM);
    $graph->yaxis->SetTickSide(SIDE_LEFT);

    $p0 =new LinePlot($ydata[0]);
    $p0->SetFillColor('sandybrown');
    $p1 =new LinePlot($ydata[1]);
    $p1->SetFillColor('lightblue');
    $p2 =new LinePlot($ydata[2]);
    $p2->SetFillColor('red');
    $ap = new AccLinePlot(array($p0,$p1,$p2));

    $graph->xaxis->SetTickLabels($xdata);
    $graph->xaxis->SetTextLabelInterval(4);

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

    // Set the angle for the labels to 90 degrees
    $graph->xaxis->SetLabelAngle(90);

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