I'm having a hard time to insert a table here when I'm asking a question. Any help would be appreciated. Also, is there any, not too expensive, math programs that allow me to enter math terms and equations kind of thing?
Thank you
Tom
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$\begingroup$ Related on tables: meta.stackexchange.com/questions/73566/… $\endgroup$Jonas Meyer– Jonas Meyer2012-05-17 19:51:47 +00:00Commented May 17, 2012 at 19:51
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$\begingroup$ Have to tried www.wolframalpha.com ? :) $\endgroup$Martol1ni– Martol1ni2012-05-17 19:51:52 +00:00Commented May 17, 2012 at 19:51
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1$\begingroup$ There is an entry on tables in the MathJax tutorial. Some support for tables is now available also in MarkDown, as illustrated in this answer. $\endgroup$Martin Sleziak– Martin Sleziak2020-12-09 04:51:29 +00:00Commented Dec 9, 2020 at 4:51
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3 Answers
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Regarding how to write general math expressions on the site, my answer here covers that well I think.
Specifically for tables, you can use LaTeX's \array command. The tabular command, which only works in text mode, is not available here, so if you want to include text in your table, you will have to do some tinkering. Here is an example table:
$$\begin{array}{c|c|c|}
& \text{Column A} & \text{Column B} \\ \hline
\text{Row 1} & 5 & \oplus \\ \hline
\text{Row 2} & \int & 8 \\ \hline
\end{array}$$
produces
$$\begin{array}{c|c|c|} & \text{Column A} & \text{Column B} \\ \hline \text{Row 1} & 5 & \oplus \\ \hline \text{Row 2} & \int & 8 \\\hline \end{array}$$
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10$\begingroup$ +1 Great example! I adapted it to display $$\begin{array}{|c|c|c|}\hline&\zeta (3)&\zeta (2)\\ \hline\sigma&3+4\ln(1+4\sqrt{2})& 2+5\ln\left(\dfrac{1+\sqrt{5}}{2}\right)\\ \hline\tau&-3+4\ln(1+\sqrt{2})&-2+5\ln\left(\dfrac{1+\sqrt{5}}{2}\right)\\ \hline\mu=1+\dfrac{\sigma}{\tau}& \dfrac{8\ln(1+\sqrt{2})}{4\ln(1+\sqrt{2})-3}&\dfrac{10 \ln \left(\dfrac{1+\sqrt{5}}{2}\right)}{5 \ln\left(\dfrac{1+\sqrt{5}}{2}\right)-2}\\ \hline \end{array}$$ $\endgroup$Américo Tavares– Américo Tavares2012-05-18 00:24:36 +00:00Commented May 18, 2012 at 0:24
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$\begingroup$ +1 Thanks. I had to try it out on one of my answers. Sorry about the bump. $\endgroup$Jyrki Lahtonen– Jyrki Lahtonen2012-05-18 10:45:19 +00:00Commented May 18, 2012 at 10:45
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$\begingroup$ Somehow, it doesn't work anymore... $\endgroup$An old man in the sea.– An old man in the sea.2020-08-21 12:10:16 +00:00Commented Aug 21, 2020 at 12:10
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(This is a CW answer, everybody is welcome to extend or improve it.)
Markdown support for tables has been enabled network-wide, this offers an alternative to the MathJax/LaTeX array environment for simple tables. MathJax can be used inside the Markdown table entries.
A simple example
Source:
| Function | Addition theorem |
| -------- | ---------------- |
| **Sine** | $\sin(x+y) = \sin(x) \cos(y) + \cos(x) \sin(y)$ |
| **Cosine** | $\cos(x+y) = \cos(x) \cos(y) - \sin(x) \sin(y)$ |
Result:
| Function | Addition theorem |
|---|---|
| Sine | $\sin(x+y) = \sin(x) \cos(y) + \cos(x) \sin(y)$ |
| Cosine | $\cos(x+y) = \cos(x) \cos(y) - \sin(x) \sin(y)$ |
More examples:
Source:
| What | MathJax |
| -------- | -------------- |
| Matrix | $\begin{pmatrix}1&2\\0&1\end{pmatrix}$ |
| Equation with a tag | \begin{equation} x^2+y^2=z^2 \tag{1} \end{equation} |
| Centered formula | $$F_{n+2}=F_{n+1}+F_n$$ |
Result:
| What | MathJax |
|---|---|
| Matrix | $\begin{pmatrix}1&2\\0&1\end{pmatrix}$ |
| Equation with a tag | \begin{equation} x^2+y^2=z^2 \tag{1} \end{equation} |
| Centered formula | $$F_{n+2}=F_{n+1}+F_n$$ |
Resources
- New Feature: Table Support on Meta Stack Exchange
- Tables in the Markdown help.
- GitHub-flavored Markdown table syntax
- Network-wide feature request to support MathJax in tables
Notes
- There is currently a bug when MathJax is used in the Markdown table header.
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Since my example given in a comment to Zev Chonoles's answer and adapted from it, due to some reason, does not display properly now, I repeat it here.
$$\begin{array}{|c|c|c|}\hline&\zeta (3)&\zeta (2)\\\hline\sigma&3+4\ln(1+4\sqrt{2})&2+5\ln\left(\dfrac{1+\sqrt{5}}{2}\right)\\\hline\tau&-3+4\ln(1+\sqrt{2})&-2+5\ln\left(\dfrac{1+\sqrt{5}}{2}\right)\\\hline\mu=1+\dfrac{\sigma}{\tau}&\dfrac{8\ln(1+\sqrt{2})}{4\ln(1+\sqrt{2})-3}&\dfrac{10\ln\left(\dfrac{1+\sqrt{5}}{2}\right)}{5\ln\left(\dfrac{1+\sqrt{5}}{2}\right)-2}\\\hline\end{array}$$
It is produced by
$$\begin{array}{|c|c|c|} \hline
&\zeta (3)&\zeta (2)\\ \hline
\sigma&3+4\ln(1+4\sqrt{2})&2+5\ln\left(\dfrac{1+\sqrt{5}}{2}\right)\\
\hline
\tau&-3+4\ln(1+\sqrt{2})&-2+5\ln\left(\dfrac{1+\sqrt{5}}{2}\right)\\ \hline
\mu=1+\dfrac{\sigma}{\tau}&\dfrac{8\ln(1+\sqrt{2})}{4\ln(1 \sqrt{2})-3}& \dfrac{10\ln\left(\dfrac{1+\sqrt{5}}{2}\right)} {5\ln\left(\dfrac{1+\sqrt{5}}{2}\right)-2}\\ \hline
\end{array}$$
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1$\begingroup$ Amusingly, without even first looking at your post, I noticed that your comment had broken and then proceeded to fix it, figuring that it's the same problem I was having here. Should I rebreak it? $\endgroup$2012-06-05 13:13:28 +00:00Commented Jun 5, 2012 at 13:13
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$\begingroup$ That or perhaps better you could add a short comment explaining how you have fixed it. $\endgroup$Américo Tavares– Américo Tavares2012-06-05 13:48:44 +00:00Commented Jun 5, 2012 at 13:48
