线宽（单位：longtabu）

Question

我试图理解为什么当我应用时，我的 Latex 代码会将文本换行到第 2 列\linewidth。列名有足够的空间。我只是希望标题的名称能够写出来并自动适应列内容的大小。

\usepackage{longtable}
\newlength{\asdf} 
\setlength{\asdf}{\textwidth}

\begin{longtabu} to \linewidth {>{\raggedright}X>{\raggedright}X>{\raggedleft}X>{\raggedleft}X}
\caption{My caption.}\\
\toprule
\textbf{Index} & \textbf{Unique expression} & \textbf{\textit{n}} & \textbf{\%}\\
\midrule
\endhead
\midrule
\multicolumn{4}{r}{\footnotesize(To be continued)}
\endfoot
\endlastfoot
\addlinespace
1 & pa & 610 & 29.16\\
2 & tsa & 462 & 22.08\\
3 & ta & 305 & 14.58\\
4 & wa & 90 & 4.30\\
5 & pam & 75 & 3.59\\
6 & gwa & 57 & 2.72\\
7 & ya & 52 & 2.49\\
8 & pum & 43 & 2.06\\
9 & wam & 41 & 1.96\\
10 & sta & 37 & 1.77\\
11 & tsan & 29 & 1.39\\
12 & um & 28 & 1.34\\
13 & gwam & 23 & 1.10\\
\bottomrule
\end{longtabu}

我尝试了其他方法来引入长表格：%\begin{longtabu}{@{}rrll@{}}，但是，虽然列没有被包裹起来，但表格并不宽达一页。

[目前的解决方法]和 \begin{longtable}{@{\extracolsep{\fill}}cccc@{}}

Answer 1

和tabularray：

\documentclass{article}
\usepackage{tabularray}
\UseTblrLibrary{booktabs, siunitx}
\SetTblrStyle{contfoot}{font=\footnotesize\itshape}

\begin{document}
\begin{longtblr}[
caption = {My caption.},
  label = {longtab:1}
                ]{width=0.5\linewidth,
                    colspec = {Q[c, m, si={table-format=2.0}]
                               X[l, m]
                               Q[c, m, si={table-format=3.0}]
                               Q[c, m, si={table-format=2.2}]
                             },
                  row{1}  = {guard, font=\bfseries},
                  rowsep  = 0pt,
                  row{odd[2-X]} = {belowsep=1ex},
                  rowhead = 1
                  } 
    \toprule                   
Index       
    &   Unique expression   
            &   \textit{n}  
                    &   \%  \\
\midrule
 1  & pa    & 610   & 29.16 \\
 2  & tsa   & 462   & 22.08 \\
 3  & ta    & 305   & 14.58 \\
 4  & wa    &  90   &  4.30 \\
 5  & pam   &  75   &  3.59 \\
 6  & gwa   &  57   &  2.72 \\
 7  & ya    &  52   &  2.49 \\
 8  & pum   &  43   &  2.06 \\
 9  & wam   &  41   &  1.96 \\
10  & sta   &  37   &  1.77 \\
11  & tsan  &  29   &  1.39 \\
12 & um & 28 & 1.34\\
13 & gwam & 23 & 1.10\\
 1  & pa    & 610   & 29.16 \\
 2  & tsa   & 462   & 22.08 \\
 3  & ta    & 305   & 14.58 \\
 4  & wa    &  90   &  4.30 \\
 5  & pam   &  75   &  3.59 \\
 6  & gwa   &  57   &  2.72 \\
 7  & ya    &  52   &  2.49 \\
 8  & pum   &  43   &  2.06 \\
 9  & wam   &  41   &  1.96 \\
10  & sta   &  37   &  1.77 \\
11  & tsan  &  29   &  1.39 \\
12 & um & 28 & 1.34\\
13 & gwam & 23 & 1.10\\

 1  & pa    & 610   & 29.16 \\
 2  & tsa   & 462   & 22.08 \\
 3  & ta    & 305   & 14.58 \\
 4  & wa    &  90   &  4.30 \\
 5  & pam   &  75   &  3.59 \\
 6  & gwa   &  57   &  2.72 \\
 7  & ya    &  52   &  2.49 \\
 8  & pum   &  43   &  2.06 \\
 9  & wam   &  41   &  1.96 \\
10  & sta   &  37   &  1.77 \\
11  & tsan  &  29   &  1.39 \\
12 & um & 28 & 1.34\\
13 & gwam & 23 & 1.10\\

 1  & pa    & 610   & 29.16 \\
 2  & tsa   & 462   & 22.08 \\
 3  & ta    & 305   & 14.58 \\
 4  & wa    &  90   &  4.30 \\
 5  & pam   &  75   &  3.59 \\
 6  & gwa   &  57   &  2.72 \\
 7  & ya    &  52   &  2.49 \\
 8  & pum   &  43   &  2.06 \\
 9  & wam   &  41   &  1.96 \\
10  & sta   &  37   &  1.77 \\
11  & tsan  &  29   &  1.39 \\
12 & um & 28 & 1.34\\
13 & gwam & 23 & 1.10\\

 1  & pa    & 610   & 29.16 \\
 2  & tsa   & 462   & 22.08 \\
 3  & ta    & 305   & 14.58 \\
 4  & wa    &  90   &  4.30 \\
 5  & pam   &  75   &  3.59 \\
 6  & gwa   &  57   &  2.72 \\
 7  & ya    &  52   &  2.49 \\
 8  & pum   &  43   &  2.06 \\
 9  & wam   &  41   &  1.96 \\
10  & sta   &  37   &  1.77 \\
11  & tsan  &  29   &  1.39 \\
12 & um & 28 & 1.34\\
13 & gwam & 23 & 1.10\\

    \bottomrule
\end{longtblr}
\end{document}