Graph & Table Macros

Use these macros to generate inline graphs and data tables within question text or solution text.

Graphs

drawgraph($settings)

Generates an inline coordinate-plane graph. Pass a settings string that configures the function, scale, and display options.

Basic usage:

$graph = drawgraph("xmin=-5,xmax=5,ymin=-5,ymax=5,f=$a*x+$b");

Then display in question text:

<p>Use the graph below to answer the question.</p>
$graph

Common Graph Settings

Setting	Default	Description
xmin, xmax	-10, 10	X-axis range
ymin, ymax	-10, 10	Y-axis range
f	(none)	Function to plot, e.g. f=x^2-3
points	(none)	Specific points, e.g. points=(1,2),(3,4)
width	300	Graph width in pixels
height	300	Graph height in pixels
grid	1	Show grid (1=yes, 0=no)
axes	1	Show axes (1=yes, 0=no)

Multiple Functions

Plot several functions on one graph by separating them with semicolons:

$graph = drawgraph("xmin=-5,xmax=5,ymin=-5,ymax=5,f=$a*x+$b;-$a*x+$b");

Drawing Question Graphs

For Drawing question types, use drawsetup() to configure the student's drawing canvas:

$setup = drawsetup("xmin=-5,xmax=5,ymin=-5,ymax=5,grid=1");

See the Drawing question type page for full options.

Tables

arraytable($array, $headers)

Generates an HTML table from an array of values.

$data = array(1, 4, 9, 16, 25);
$headers = array("n", "n²");
$table = arraytable($data, $headers);

matrixtable($matrix)

Displays a 2D array as a formatted matrix table:

$m = array(array(1, 2), array(3, 4));
$table = matrixtable($m);

Manual HTML Tables

For full control, write HTML directly in the question text:

<table>
  <thead><tr><th>x</th><th>f(x)</th></tr></thead>
  <tbody>
    <tr><td>0</td><td>`$f0`</td></tr>
    <tr><td>1</td><td>`$f1`</td></tr>
    <tr><td>2</td><td>`$f2`</td></tr>
  </tbody>
</table>

Images

To include a static image in a question, upload it to the question's file library and reference it:

<img src="$imgurl" alt="Description of the figure" />

Where $imgurl is the URL returned after uploading through the question editor's media library.