84 lines
2.0 KiB
PHP
84 lines
2.0 KiB
PHP
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<?php // content="text/plain; charset=utf-8"
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//
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// Example of frequence bar
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//
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require_once ('jpgraph/jpgraph.php');
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require_once ('jpgraph/jpgraph_bar.php');
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require_once ('jpgraph/jpgraph_line.php');
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// Utility function to calculate the accumulated frequence
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// for a set of values and ocurrences
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function accfreq($data) {
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rsort($data);
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$s = array_sum($data);
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$as = array($data[0]);
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$asp = array(100*$as[0]/$s);
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$n = count($data);
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for( $i=1; $i < $n; ++$i ) {
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$as[$i] = $as[$i-1]+$data[$i];
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$asp[$i] = 100.0*$as[$i]/$s;
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}
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return $asp;
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}
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// some data
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$data_freq = array(22,20,12,10,5,4,2);
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$data_accfreq = accfreq($data_freq);
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// Create the graph.
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$graph = new Graph(350,250);
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// Setup some basic graph parameters
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$graph->SetScale("textlin");
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$graph->SetY2Scale('lin',0,100);
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$graph->img->SetMargin(50,70,30,40);
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$graph->yaxis->SetTitleMargin(30);
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$graph->SetMarginColor('#EEEEEE');
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// Setup titles and fonts
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$graph->title->Set("Frequence plot");
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$graph->xaxis->title->Set("X-title");
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$graph->yaxis->title->Set("Y-title");
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$graph->title->SetFont(FF_FONT1,FS_BOLD);
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$graph->yaxis->title->SetFont(FF_FONT1,FS_BOLD);
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$graph->xaxis->title->SetFont(FF_FONT1,FS_BOLD);
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// Turn the tickmarks
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$graph->xaxis->SetTickSide(SIDE_DOWN);
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$graph->yaxis->SetTickSide(SIDE_LEFT);
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$graph->y2axis->SetTickSide(SIDE_RIGHT);
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$graph->y2axis->SetColor('black','blue');
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$graph->y2axis->SetLabelFormat('%3d.0%%');
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// Create a bar pot
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$bplot = new BarPlot($data_freq);
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// Create accumulative graph
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$lplot = new LinePlot($data_accfreq);
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// We want the line plot data point in the middle of the bars
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$lplot->SetBarCenter();
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// Use transperancy
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$lplot->SetFillColor('lightblue@0.6');
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$lplot->SetColor('blue@0.6');
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$graph->AddY2($lplot);
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// Setup the bars
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$bplot->SetFillColor("orange@0.2");
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$bplot->SetValuePos('center');
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$bplot->value->SetFormat("%d");
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$bplot->value->SetFont(FF_ARIAL,FS_NORMAL,9);
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$bplot->value->Show();
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// Add it to the graph
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$graph->Add($bplot);
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// Send back the HTML page which will call this script again
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// to retrieve the image.
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$graph->Stroke();
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?>
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