<?php // content="text/plain; charset=utf-8"
//
// Example of frequence bar
//
require_once '../../vendor/autoload.php';
use Amenadiel\JpGraph\Graph;
use Amenadiel\JpGraph\Plot;

require_once 'jpgraph/jpgraph_line.php';

// Utility function to calculate the accumulated frequence
// for a set of values and ocurrences
function accfreq($data)
{
    rsort($data);
    $s   = array_sum($data);
    $as  = array($data[0]);
    $asp = array(100 * $as[0] / $s);
    $n   = count($data);
    for ($i = 1; $i < $n; ++$i) {
        $as[$i]  = $as[$i - 1] + $data[$i];
        $asp[$i] = 100.0 * $as[$i] / $s;
    }
    return $asp;
}

// some data
$data_freq    = array(22, 20, 12, 10, 5, 4, 2);
$data_accfreq = accfreq($data_freq);

// Create the graph.
$graph = new Graph\Graph(350, 250);

// Setup some basic graph parameters
$graph->SetScale("textlin");
$graph->SetY2Scale('lin', 0, 100);
$graph->img->SetMargin(50, 70, 30, 40);
$graph->yaxis->SetTitleMargin(30);
$graph->SetMarginColor('#EEEEEE');

// Setup titles and fonts
$graph->title->Set("Frequence plot");
$graph->xaxis->title->Set("X-title");
$graph->yaxis->title->Set("Y-title");

$graph->title->SetFont(FF_FONT1, FS_BOLD);
$graph->yaxis->title->SetFont(FF_FONT1, FS_BOLD);
$graph->xaxis->title->SetFont(FF_FONT1, FS_BOLD);

// Turn the tickmarks
$graph->xaxis->SetTickSide(SIDE_DOWN);
$graph->yaxis->SetTickSide(SIDE_LEFT);

$graph->y2axis->SetTickSide(SIDE_RIGHT);
$graph->y2axis->SetColor('black', 'blue');
$graph->y2axis->SetLabelFormat('%3d.0%%');

// Create a bar pot
$bplot = new Plot\BarPlot($data_freq);

// Create accumulative graph
$lplot = new Plot\LinePlot($data_accfreq);

// We want the line plot data point in the middle of the bars
$lplot->SetBarCenter();

// Use transperancy
$lplot->SetFillColor('lightblue@0.6');
$lplot->SetColor('blue@0.6');
$graph->AddY2($lplot);

// Setup the bars
$bplot->SetFillColor("orange@0.2");
$bplot->SetValuePos('center');
$bplot->value->SetFormat("%d");
$bplot->value->SetFont(FF_ARIAL, FS_NORMAL, 9);
$bplot->value->Show();

// Add it to the graph
$graph->Add($bplot);

// Send back the HTML page which will call this script again
// to retrieve the image.
$graph->Stroke();
