73 lines
1.7 KiB
PHP
73 lines
1.7 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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$f = new FuncGenerator('cos($x)+1.5*cos(2*$x)');
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list($datax,$datay) = $f->E(0,10);
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// Now get labels at 1/2 PI intervall
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$tickPositions = array();
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$tickLabels = array();
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$tickPositions[0] = 0;
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$tickLabels[0] = '0';
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for($i=1; $i/2*M_PI < 11 ; ++$i ) {
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$tickPositions[$i] = $i/2*M_PI;
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if( $i % 2 )
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$tickLabels[$i] = $i.'/2'.SymChar::Get('pi');
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else
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$tickLabels[$i] = ($i/2).SymChar::Get('pi');
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}
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$n = count($datax);
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$xmin = $datax[0];
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$xmax = $datax[$n-1];
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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('linlin',0,0,$xmin,$xmax);
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$graph->title->Set('Example with manual tick labels');
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$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->SetMajTickPositions($tickPositions,$tickLabels);
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// Use Times font
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$graph->xaxis->SetFont(FF_TIMES,FS_NORMAL,10);
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$graph->yaxis->SetFont(FF_TIMES,FS_NORMAL,10);
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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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