For some questions and answers - I would have liked to make a truth table.
Is there a way to make a truth table OR generally any table?
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3 Answers
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1
Yes, tables are possible with MathJax. Here's an example, taken from Mathematics.SE:
$$ \begin{array}{c|lcr} n & \text{Left} & \text{Center} & \text{Right} \\ \hline 1 & 0.24 & 1 & 125 \\ 2 & -1 & 189 & -8 \\ 3 & -20 & 2000 & 1+10i \end{array} $$
This table was created with the following MathJax code:
$$
\begin{array}{c|lcr}
n & \text{Left} & \text{Center} & \text{Right} \\
\hline
1 & 0.24 & 1 & 125 \\
2 & -1 & 189 & -8 \\
3 & -20 & 2000 & 1+10i
\end{array}
$$
So, here's a simple truth table example:
$$ p \land q \\ \begin{array}{c|c} p & q & p \land q \\ \hline T & T & T \\ T & F & F \\ F & T & F \\ F & F & F \\ \end{array} $$
$$
p \land q \\
\begin{array}{c|c}
p & q & p \land q \\ \hline
T & T & T \\
T & F & F \\
F & T & F \\
F & F & F \\
\end{array}
$$
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Stack Exchange now has table support
Markdown-based tables are preferable in vast majority of situations where tables are required. To demonstrate why, I'll make a table.
| Feature | Markdown | MathJax |
|---|---|---|
| Table looks like a table to visual-based users | Yes | Yes |
| Screen readers can, in general, read the table* | Yes | No |
| Spreadsheet-friendly (Can you copy-paste?) | Yes | No |
| Right/Left/Center align columns | Yes | Yes |
| Easy to explain/type out | Yes** | No |
| Merge cells or toggle borders on/off | No | Yes |
| Looks pretty | Yes*** | No |
| Bold/italic/link formatting | Yes | Yes**** |
| Ability to create tables without header rows | No***** | Yes |
Very few tables absolutely require merged cells or the ability to control which borders show up. If your table does, then fine, use MathJax. Otherwise use Markdown. For accessibility, if nothing else.
The main-meta link above has a more in-depth tutorial. Here's how to make the two example tables in the MathJax answer, using Markdown formatting.
| n | Left | Center | Right |
|---|---|---|---|
| 1 | 0.24 | 1 | 125 |
| 2 | -1 | 189 | -8 |
| 3 | -20 | 2000 | 1+10i |
| n | Left | Center | Right |
|---|:-----|:------:|------:|
| 1 | 0.24 | 1 | 125 |
| 2 | -1 | 189 | -8 |
| 3 | -20 | 2000 | 1+10i |
p∧q
| p | q | p∧q |
|---|---|---|
| T | T | T |
| T | F | F |
| F | T | F |
| F | F | F |
p∧q
| p | q | p∧q |
|---|---|-----|
| T | T | T |
| T | F | F |
| F | T | F |
| F | F | F |
* This is because MathJax, especially complicated MathJax such as tables, is difficult for screen readers to understand as intended. Markdown tables create tables in the underlying HTML code and can therefore be read by any half-competent screen reader.
** Both my opinion and backed up by how much less special syntax is required
*** An opinion shared by @Lukas Rotter and @Sciborg
**** But you have to use MathJax instead of Markdown to do so
***** But you can just leave the header row blank
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Doorknob's answer is perfect, but I would like to point to an easy-alternative (useful in some cases): Use Windword/Excel/whatever to create your table. Do a quick screen-shot (CTRL + Print) and cut out the table from the image (to keep file-size small.) Then upload as an image.
(Disadvantages, of course, no copy&paste of the content for readers and not so easy to correct.)
