Math columns in tabularray

Question

The package tabularray seems like a good start, but the documentation is really sparse. Is there a way to add math columns? Like X[$] in tabu or \newcolumntype{C}{>{$}c<{$}}in array.

Answer 1

\documentclass{article}
\usepackage{tabularray}
\NewColumnType{C}{>{$}c<{$}}
\begin{document}

\begin{table}[h]
    \caption{Table caption}
    \begin{tblr}{colspec={l>{$}c<{$}}}
    text & \alpha 
    \end{tblr}
\end{table}


\begin{table}[h]
    \caption{Table caption}
    \begin{tblr}{colspec={lC}}
    text & \alpha 
    \end{tblr}
\end{table}
\end{document}

Answer 2

Since version 2021P, tabularray package has $ and $$ options for cells/rows/columns.

\documentclass{article}

\usepackage{amsmath}
\usepackage{tabularray}

\begin{document}

\begin{tblr}{colspec={lQ[c,$]Q[r,$$]},hlines}
  text & \frac{1}{2} & -\frac{3}{4} \\
  text & \frac{5}{6} & -\frac{7}{8}
\end{tblr}

\end{document}