dateaxisex4.php

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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_date.php");

    // Create a data set in range (50,70) and X-positions
    DEFINE('NDATAPOINTS',360);
    DEFINE('SAMPLERATE',240);
    $start = time();
    $end = $start+NDATAPOINTS*SAMPLERATE;
    $data = array();
    $xdata = array();
    for( $i=0; $i < NDATAPOINTS; ++$i ) {
        $data[$i] = rand(50,70);
        $xdata[$i] = $start + $i * SAMPLERATE;
    }

    // Create the new graph
    $graph = new Graph(540,300);

    // Slightly larger than normal margins at the bottom to have room for
    // the x-axis labels
    $graph->SetMargin(40,40,30,130);

    // Fix the Y-scale to go between [0,100] and use date for the x-axis
    $graph->SetScale('datlin',0,100);
    $graph->title->Set("Example on Date scale");

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

    // The automatic format string for dates can be overridden
    $graph->xaxis->scale->SetDateFormat('H:i');

    // Adjust the start/end to a specific alignment
    $graph->xaxis->scale->SetTimeAlign(MINADJ_10);

    $line = new LinePlot($data,$xdata);
    $line->SetLegend('Year 2005');
    $line->SetFillColor('lightblue@0.5');
    $graph->Add($line);
    $graph->Stroke();
    ?>