5. Every 3rd item

The code below is the source for this graph.

<?php
// 5. Every 3rd item
require_once 'SVGGraph/autoloader.php';

$settings = [
  'auto_fit' => true,
  'back_colour' => '#eee',
  'back_stroke_width' => 0,
  'back_stroke_colour' => '#eee',
  'show_data_labels' => true,
  'data_label_space' => 5,
  'data_label_back_colour' => '#ccc',
  'marker_size' => 3,
  'bar_space' => 1,
  'group_space' => 0,
  'show_tooltips' => false,
  'axis_font_size' => 12,
  'data_label_filter' => '3',
  'axis_max_v' => 10,
];
$type = 'BarGraph';
$w = 300;

$values = [
  4, 2, 1, 2, 2, 4, 5, 6, 5, 4, 3, 2, 2, 3, 4, 5, 5, 4, 2, 3, 4, 8, 4,
];

$graph = new Goat1000\SVGGraph\SVGGraph($w, 200, $settings);

$graph->values($values);
$graph->colourRangeHexHSL(0, '#f33', '#f3f');
$graph->colourRangeHexHSL(1, '#36f', '#3ff');
$graph->colourRangeHexHSL(2, '#fc0', '#fff');
$graph->colourRangeHexHSL(3, '#0f0', '#393');
$graph->render($type);

Please note: the source code above comes from a script used to generate one of the example graphs on the site. This is simply a wrapper page to apply highlighting and make the source code easier to read, so there is no content here to describe what the source code is doing.