[42] | 1 | <?php // content="text/plain; charset=utf-8" |
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| 2 | // |
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| 3 | // Example of frequence bar |
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| 4 | // |
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| 5 | require_once ('jpgraph/jpgraph.php'); |
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| 6 | require_once ('jpgraph/jpgraph_bar.php'); |
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| 7 | require_once ('jpgraph/jpgraph_line.php'); |
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| 8 | |
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| 9 | // Utility function to calculate the accumulated frequence |
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| 10 | // for a set of values and ocurrences |
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| 11 | function accfreq($data) { |
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| 12 | rsort($data); |
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| 13 | $s = array_sum($data); |
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| 14 | $as = array($data[0]); |
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| 15 | $asp = array(100*$as[0]/$s); |
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| 16 | $n = count($data); |
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| 17 | for( $i=1; $i < $n; ++$i ) { |
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| 18 | $as[$i] = $as[$i-1]+$data[$i]; |
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| 19 | $asp[$i] = 100.0*$as[$i]/$s; |
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| 20 | } |
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| 21 | return $asp; |
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| 22 | } |
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| 23 | |
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| 24 | // some data |
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| 25 | $data_freq = array(22,20,12,10,5,4,2); |
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| 26 | $data_accfreq = accfreq($data_freq); |
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| 27 | |
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| 28 | // Create the graph. |
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| 29 | $graph = new Graph(350,250); |
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| 30 | |
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| 31 | // Setup some basic graph parameters |
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| 32 | $graph->SetScale("textlin"); |
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| 33 | $graph->SetY2Scale('lin',0,100); |
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| 34 | $graph->img->SetMargin(50,70,30,40); |
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| 35 | $graph->yaxis->SetTitleMargin(30); |
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| 36 | $graph->SetMarginColor('#EEEEEE'); |
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| 37 | |
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| 38 | // Setup titles and fonts |
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| 39 | $graph->title->Set("Frequence plot"); |
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| 40 | $graph->xaxis->title->Set("X-title"); |
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| 41 | $graph->yaxis->title->Set("Y-title"); |
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| 42 | |
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| 43 | $graph->title->SetFont(FF_FONT1,FS_BOLD); |
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| 44 | $graph->yaxis->title->SetFont(FF_FONT1,FS_BOLD); |
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| 45 | $graph->xaxis->title->SetFont(FF_FONT1,FS_BOLD); |
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| 46 | |
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| 47 | // Turn the tickmarks |
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| 48 | $graph->xaxis->SetTickSide(SIDE_DOWN); |
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| 49 | $graph->yaxis->SetTickSide(SIDE_LEFT); |
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| 50 | |
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| 51 | $graph->y2axis->SetTickSide(SIDE_RIGHT); |
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| 52 | $graph->y2axis->SetColor('black','blue'); |
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| 53 | $graph->y2axis->SetLabelFormat('%3d.0%%'); |
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| 54 | |
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| 55 | // Create a bar pot |
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| 56 | $bplot = new BarPlot($data_freq); |
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| 57 | |
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| 58 | // Create accumulative graph |
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| 59 | $lplot = new LinePlot($data_accfreq); |
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| 60 | |
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| 61 | // We want the line plot data point in the middle of the bars |
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| 62 | $lplot->SetBarCenter(); |
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| 63 | |
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| 64 | // Use transperancy |
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| 65 | $lplot->SetFillColor('lightblue@0.6'); |
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| 66 | $lplot->SetColor('blue@0.6'); |
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| 67 | $graph->AddY2($lplot); |
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| 68 | |
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| 69 | // Setup the bars |
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| 70 | $bplot->SetFillColor("orange@0.2"); |
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| 71 | $bplot->SetValuePos('center'); |
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| 72 | $bplot->value->SetFormat("%d"); |
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| 73 | $bplot->value->SetFont(FF_ARIAL,FS_NORMAL,9); |
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| 74 | $bplot->value->Show(); |
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| 75 | |
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| 76 | // Add it to the graph |
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| 77 | $graph->Add($bplot); |
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| 78 | |
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| 79 | // Send back the HTML page which will call this script again |
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| 80 | // to retrieve the image. |
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| 81 | $graph->Stroke(); |
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| 82 | |
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| 83 | ?> |
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