Graphics, Figures & Tables ⇒ Problem with equation in table

[mexxwel]

Hey there!

I'd like to create a table with two parameters and the corresponding equation.
Somehow Latex gives me the error: '! Missing $ inserted.' and I don't know what that means...

Code: Select all

Code, edit and compile here:

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\begin{table}[H]
\centering
\caption{XXX}
\label{tab:XXX}
\begin{adjustbox}{max width=\textwidth}
    \begin{tabular}{c c}
    \hline\hline
    \vspace{0.25cm}
    Parameter & Mathematical Equation \\    \hline 
    \vspace{0.25cm}
    Standard Deviation & \sigma=\sqrt{\frac{\sum(X-\mu)$^2$}{N}} \\
    \vspace{0.25cm}
    Variance & \sigma^2=\frac{\sum(X-\mu)$^2$}}{N} \\
    \\ \hline
    \end{tabular}
\end{adjustbox}
\end{table}
 
 
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Run LaTeX here

Thanks for your help!

[Johannes_B]

Welcome,

you put only the superscript in mathmode, but the whole equation needs to be in mathmode. Below, an example that sets the second column in math mode as a whole.

Code: Select all

Code, edit and compile here:

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\documentclass{article}
\usepackage{mathtools}
\usepackage{booktabs}
\usepackage{array}
\setlength{\defaultaddspace}{.75em}
\begin{document}
\begin{tabular}{c >{$\displaystyle}c<{$}}
            \toprule
            Parameter          & $Mathematical Equation$ \\
            \midrule
            Standard Deviation & \sigma=\sqrt{\frac{\sum(X-\mu)^2}{N}} \\\addlinespace
            Variance           & \sigma^2=\frac{\sum(X-\mu)^2}{N} \\
            \bottomrule
        \end{tabular}
\end{document}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Run LaTeX here