📂Academic Writing

How to Insert Tables Aligned by Decimal Points in LaTeX

Code

To sort numbers by their decimal point in the table of $\TeX$, use the siunitx package.

S[table-format=x.y]

You can place the table contents inside the opening and closing of {tabular}, and an option like table-format=x.y specifies a maximum of x digits before the decimal point and a maximum of y digits after the decimal point.

• For example, S[table-format=4.10] is used when aligning numbers with at most 4 digits before the decimal point and at most 10 digits after it.

\documentclass{article}
\usepackage{array, siunitx}

\begin{document}

\begin{table}[h]
    \centering
    \begin{tabular}{S[table-format=4.10]}
        \hline
        \text{value} \\
        \hline
        3.1415926535 \\
        2.71828182 \\
        123.4 \\
        78.91 \\
        \hline
    \end{tabular}
\end{table}

\end{document}

The rendered result is aligned on the decimal point as follows.