16. Line graph [y = e^x]

The code below is the source for this graph.

<?php
// 16. Line graph [y = e<sup>x</sup>]
require_once 'SVGGraph/autoloader.php';

$settings = [
  'auto_fit' => true,
  'back_colour' => '#eee',
  'back_stroke_width' => 0,
  'back_stroke_colour' => '#eee',
  'stroke_colour' => '#000',
  'axis_colour' => '#333',
  'axis_overlap' => 3,
  'grid_colour' => '#999',
  'label_colour' => '#000',
  'axis_font' => 'Arial',
  'axis_font_size' => 10,
  'fill_under' => true,
  'pad_right' => 0,
  'pad_left' => 10,
  'marker_type' => 'circle',
  'marker_size' => 3,
  'marker_colour' => 'blue',
  'minimum_grid_spacing' => 20,
  'structure' => ['key' => 0, 'value' => 1],
  'fill_opacity' => 0.7,
];

$width = 300;
$height = 300;
$type = 'LineGraph';
$values = [];
for($x = 1; $x <= 8; $x += 0.25) {
  $values[] = ['e^' . $x, pow(M_E, $x)];
}
$colours = [ ['#010130','#e0e0e0'], ];

$graph = new Goat1000\SVGGraph\SVGGraph($width, $height, $settings);
$graph->colours($colours);

$graph->values($values);
$graph->render($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.