dateaxisex4.php

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44

    <?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();
    ?>