[42] | 1 | <?php // content="text/plain; charset=utf-8" |
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| 2 | // |
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| 3 | // Basic example on how to use custom tickmark feature to have a label |
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| 4 | // at the start of each month. |
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| 5 | // |
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| 6 | require_once ('jpgraph/jpgraph.php'); |
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| 7 | require_once ('jpgraph/jpgraph_line.php'); |
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| 8 | require_once ('jpgraph/jpgraph_utils.inc.php'); |
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| 9 | |
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| 10 | // |
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| 11 | // Create some random data for the plot. We use the current time for the |
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| 12 | // first X-position |
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| 13 | // |
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| 14 | $f = new FuncGenerator('cos($x)+1.5*cos(2*$x)'); |
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| 15 | list($datax,$datay) = $f->E(0,10); |
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| 16 | |
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| 17 | // Now get labels at 1/2 PI intervall |
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| 18 | $tickPositions = array(); |
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| 19 | $tickLabels = array(); |
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| 20 | $tickPositions[0] = 0; |
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| 21 | $tickLabels[0] = '0'; |
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| 22 | for($i=1; $i/2*M_PI < 11 ; ++$i ) { |
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| 23 | $tickPositions[$i] = $i/2*M_PI; |
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| 24 | if( $i % 2 ) |
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| 25 | $tickLabels[$i] = $i.'/2'.SymChar::Get('pi'); |
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| 26 | else |
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| 27 | $tickLabels[$i] = ($i/2).SymChar::Get('pi'); |
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| 28 | } |
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| 29 | |
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| 30 | $n = count($datax); |
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| 31 | $xmin = $datax[0]; |
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| 32 | $xmax = $datax[$n-1]; |
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| 33 | |
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| 34 | // |
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| 35 | // The code to setup a very basic graph |
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| 36 | // |
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| 37 | $graph = new Graph(400,200); |
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| 38 | |
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| 39 | // |
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| 40 | // We use an integer scale on the X-axis since the positions on the X axis |
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| 41 | // are assumed to be UNI timestamps |
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| 42 | $graph->SetScale('linlin',0,0,$xmin,$xmax); |
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| 43 | $graph->title->Set('Example with manual tick labels'); |
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| 44 | $graph->title->SetFont(FF_ARIAL,FS_NORMAL,12); |
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| 45 | |
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| 46 | // |
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| 47 | // Make sure that the X-axis is always at the bottom of the scale |
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| 48 | // (By default the X-axis is alwys positioned at Y=0 so if the scale |
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| 49 | // doesn't happen to include 0 the axis will not be shown) |
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| 50 | $graph->xaxis->SetPos('min'); |
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| 51 | |
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| 52 | // Now set the tic positions |
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| 53 | $graph->xaxis->SetMajTickPositions($tickPositions,$tickLabels); |
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| 54 | |
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| 55 | // Use Times font |
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| 56 | $graph->xaxis->SetFont(FF_TIMES,FS_NORMAL,10); |
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| 57 | $graph->yaxis->SetFont(FF_TIMES,FS_NORMAL,10); |
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| 58 | |
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| 59 | // Add a X-grid |
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| 60 | $graph->xgrid->Show(); |
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| 61 | |
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| 62 | // Create the plot line |
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| 63 | $p1 = new LinePlot($datay,$datax); |
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| 64 | $p1->SetColor('teal'); |
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| 65 | $graph->Add($p1); |
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| 66 | |
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| 67 | // Output graph |
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| 68 | $graph->Stroke(); |
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| 69 | |
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| 70 | ?> |
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| 71 | |
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| 72 | |
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