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I wonder if it's possible to automatically center a table entry vertically and horizontally within a tabularx environment.

You can see that the matrix does not center: output

The code I want to adjust is:

\begin{table}[h] \renewcommand{\arraystretch}{1.1} \centering{\caption{Test Table} \begin{tabularx}{\textwidth}{|X||c|c|c|c|c|} \hline Holder1 & \multicolumn{2}{c|}{Holder2}& \multicolumn{2}{c|}{Holder3} & Holder4 \\ % \cline{2-5} & $\boldsymbol{X}_1$ & $\boldsymbol{X}_1$ & $\boldsymbol{X}_2$ & {$\boldsymbol{X}_2$} & {Holder4 additional}\\ \cline{1-6} abcv abcv abcv abcv abcv abcv ac sf abcv abcv & $\begin{bmatrix} W_{11} \end{bmatrix}$ & $\begin{bmatrix} D_{11} \end{bmatrix}$ & $\begin{bmatrix} K_{12} \end{bmatrix}$ & 0 & 22\\ \hline abcv abcv abcv abcv abcv abcv ac sf abcv abcv & $\begin{bmatrix} DD_{11} \\ Kl_{21} \end{bmatrix}$ & $\begin{bmatrix} D_{11} \\ D_{21} \end{bmatrix}$ & $\begin{bmatrix} X_{12} \\ S_{22} \end{bmatrix}$ & 0 & 1\\ \hline \text{text text text} & $\begin{bmatrix} G_{11} & G_{41} \\ G_{21} & G_{51} \\ W_{31} & O_{61} \end{bmatrix}$ & $\begin{bmatrix} G_{11} \\ G_{21} \\ G_{31} \end{bmatrix}$ & $\begin{bmatrix} F_{12} \\ F_{12} \\ X_{12} \end{bmatrix}$ & 0 & 3\\ \hline \end{tabularx} \label{}} \end{table}
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  • Welcome to TeX SX! Is it for a single entry (I suppose the first column head) or for all entries in the column? Commented May 28, 2017 at 9:55
  • Hi Bernard, it should be for all entries. Especially for the entries with the matrix since they overlap Commented May 28, 2017 at 9:58

2 Answers 2

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Redefine the X column type as m{#1}. I added some vertical padding with cellspace and extrarowheight and gave a decent spacing between caption and table with the caption package.

\documentclass{article} \usepackage[utf8]{inputenc} \usepackage{amsmath} \usepackage{tabularx, caption} \usepackage{cellspace} \setlength\cellspacetoplimit{4pt} \setlength\cellspacebottomlimit{4pt} \renewcommand{\tabularxcolumn}[1]{>{\centering}m{#1}} \begin{document} \begin{table}[h] \caption{Test Table} \setlength\extrarowheight{2pt} \begin{tabularx}{\textwidth}{|X||*{5}{Sc|}} \hline Holder1 & \multicolumn{2}{c|}{Holder2}& \multicolumn{2}{c|}{Holder3} & Holder4 \\ \cline{2-5} & $\boldsymbol{X}₁$ & $\boldsymbol{X}₁$ & $\boldsymbol{X}₂$ & {$\boldsymbol{X}₂$} & {Holder4 additional} \\ \cline{1-6} \strut abcv abcv abcv abcv abcv abcv ac sf abcv abcv & $\begin{bmatrix} W_{11} \end{bmatrix}$ & $\begin{bmatrix} D_{11} \end{bmatrix}$ & $\begin{bmatrix} K_{12} \end{bmatrix}$ & 0 & 22 \\ \hline abcv abcv abcv abcv abcv abcv ac sf abcv abcv & $\begin{bmatrix} DD_{11} \\ Kl_{21} \end{bmatrix}$ & $\begin{bmatrix} D_{11} \\ D_{21} \end{bmatrix}$ & $\begin{bmatrix} X_{12} \\ S_{22} \end{bmatrix}$ & 0 & 1 \\ \hline \text{text text text} & $\begin{bmatrix} G_{11} & G_{41} \\ G_{21} & G_{51} \\ W_{31} & O_{61} \end{bmatrix}$ & $\begin{bmatrix} G_{11} \\ G_{21} \\ G_{31} \end{bmatrix}$ & $\begin{bmatrix} F_{12} \\ F_{12} \\ X_{12} \end{bmatrix}$ & 0 & 3 \\ \hline \end{tabularx} \label{} \end{table} \end{document}

enter image description here

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  • Thank you Bernard, do you know why I get the following errors using your code?: siunitx error: "duplicate-exponent-token" Duplicate exponent marker token '\token_to_str:N e' in input. For immediate help type H <return>. \end{tabularx} -------------------- siunitx error: "invalid-number" Invalid numerical input 'de'. For immediate help type H <return>. \end{tabularx} -------------------- Emergency stop. \end{tabularx} Commented May 28, 2017 at 10:43
  • This did not happen with just my code, since it doesn't use siunitx. Could you post a (full) minimal example code reproducing the error? Commented May 28, 2017 at 10:47
  • Yes you are right, it works if I simply execute your code. If I add the \usepackage{siunitx} it throws an error Commented May 28, 2017 at 10:59
  • @Zeit: I had forgotten: that is due to the S pre-qualifier used by cellspace to ensure padding in the corresponding columns, as it is also defined as a column type by siunitx. The solution is explained in the documentation of the latter package: use the pre-qualifier C instead–hoping you don't already have to use a C column type… Commented May 28, 2017 at 11:16
  • That is a great comment! Now it is simply perfect with the C pre-qualifier :) Thank you Commented May 28, 2017 at 11:22
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\documentclass[a4paper,11pt,ngerman]{scrartcl} \usepackage{amsmath} \usepackage{tabularx} \renewcommand\tabularxcolumn[1]{m{#1}} \begin{document} \renewcommand{\arraystretch}{1.7} \begin{tabularx}{\textwidth}{|X||c|c|c|c|c|} \hline Holder1 & \multicolumn{2}{c|}{Holder2}& \multicolumn{2}{c|}{Holder3} & Holder4 \\ % \cline{2-5} & $\boldsymbol{X}_1$ & $\boldsymbol{X}_1$ & $\boldsymbol{X}_2$ & {$\boldsymbol{X}_2$} & {Holder4 additional}\\ \cline{1-6} abcv abcv abcv abcv abcv abcv ac sf abcv abcv & $\begin{bmatrix} W_{11} \end{bmatrix}$ & $\begin{bmatrix} D_{11} \end{bmatrix}$ & $\begin{bmatrix} K_{12} \end{bmatrix}$ & 0 & 22\\ \hline abcv abcv abcv abcv abcv abcv ac sf abcv abcv & $\begin{bmatrix} DD_{11} \\ Kl_{21} \end{bmatrix}$ & $\begin{bmatrix} D_{11} \\ D_{21} \end{bmatrix}$ & $\begin{bmatrix} X_{12} \\ S_{22} \end{bmatrix}$ & 0 & 1\\ \hline \strut\text{text text text} & $\begin{bmatrix} G_{11} & G_{41} \\ G_{21} & G_{51} \\ W_{31} & O_{61} \end{bmatrix}$ & $\begin{bmatrix} G_{11} \\ G_{21} \\ G_{31} \end{bmatrix}$ & $\begin{bmatrix} F_{12} \\ F_{12} \\ X_{12} \end{bmatrix}$ & 0 & 3\\ \hline \end{tabularx} \end{document}

enter image description here

However, I wouldn't use all the vertical lines.

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  • Thank you very much Herbert, it looks much better now. Do you think it is also possible to add extra space between the brackets of the matrix and the horizontal lines? Especially the last row is quite close to the this line. Commented May 28, 2017 at 10:18
  • for the last row use something like \rule[-1cm]{0pt}{2cm}\text{text text text} & ... . It is an invisible vertical line Commented May 28, 2017 at 10:26

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