74 lines
1.8 KiB
PHP
74 lines
1.8 KiB
PHP
<?php
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//
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// Basic example on how to use custom tickmark feature to have a label
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// at the start of each month.
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//
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include ("../jpgraph.php");
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include ("../jpgraph_line.php");
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include ("../jpgraph_utils.inc.php");
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//
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// Create some random data for the plot. We use the current time for the
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// first X-position
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//
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$datay = array();
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$datax = array();
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$ts = time();
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$n=15; // Number of data points
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for($i=0; $i < $n; ++$i ) {
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$datax[$i] = $ts+$i*700000;
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$datay[$i] = rand(5,60);
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}
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// Now get labels at the start of each month
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$dateUtils = new DateScaleUtils();
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list($tickPositions,$minTickPositions) = $dateUtils->GetTicks($datax);
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// We add some grace to the end of the X-axis scale so that the first and last
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// data point isn't exactly at the very end or beginning of the scale
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$grace = 400000;
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$xmin = $datax[0]-$grace;
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$xmax = $datax[$n-1]+$grace;
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//
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// The code to setup a very basic graph
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//
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$graph = new Graph(400,200);
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//
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// We use an integer scale on the X-axis since the positions on the X axis
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// are assumed to be UNI timestamps
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$graph->SetScale('intlin',0,0,$xmin,$xmax);
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$graph->title->Set('Basic example with manual ticks');
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$graph->title->SetFont(FF_ARIAL,FS_NORMAL,12);
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//
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// Make sure that the X-axis is always at the bottom of the scale
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// (By default the X-axis is alwys positioned at Y=0 so if the scale
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// doesn't happen to include 0 the axis will not be shown)
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$graph->xaxis->SetPos('min');
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// Now set the tic positions
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$graph->xaxis->SetTickPositions($tickPositions,$minTickPositions);
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// The labels should be formatted at dates with "Year-month"
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$graph->xaxis->SetLabelFormatString('My',true);
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// Use Ariel font
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$graph->xaxis->SetFont(FF_ARIAL,FS_NORMAL,9);
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// Add a X-grid
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$graph->xgrid->Show();
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// Create the plot line
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$p1 = new LinePlot($datay,$datax);
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$p1->SetColor('teal');
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$graph->Add($p1);
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// Output graph
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$graph->Stroke();
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?>
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