# Diagonal line through whole table

I am trying to set up an intercorrelation table showing results of two samples. However, for better visuals, I want to split this table into two parts by adding a diagonal line through whole table (not only one cell). The cells themselves have different lengths.

I actually tried to use diagbox, but it failed, (afaik) because it's only intended to be applied at one cell only.

\documentclass{article}

\usepackage{tabularx}
\usepackage{booktabs}
\usepackage{diagbox}

\begin{document}

\begin{tabular}{rrrrrr}
\toprule \\[-1.8ex]
& AAAAA & BBBBBBBB & CCCCC & DDDDDD & EEEEEE \\
\midrule
A & \backslashbox && && \\
B & .XX***  &  \backslashbox & &  & \\
C & .XX***  & .XX***  & \backslashbox & & \\
D & .XX***  & .XX***  & .XX***  & \backslashbox &\\
E & .XX***  & .XX***  & .XX***  & .XX***  & \backslashbox \\
\bottomrule
\end{tabular}

\end{document}


Any ideas - I checked existing answers but none seems to fit.

Here is a possibility with pstricks, if I've well understood what you want:

\documentclass{article}

\usepackage{tabularx}
\usepackage{booktabs}
\usepackage{diagbox}
\usepackage{pst-node, auto-pst-pdf}

\begin{document}

\begin{postscript}
\begin{tabular}{rrrrrr}
\toprule \\[-1.8ex]
& AAAAA & BBBBBBBB & CCCCC & DDDDDD & EEEEEE \\
\midrule
A \pnode[1em, 2.6ex]{A} & && && \\
B & .XX*** & & & & \\
C & .XX*** & .XX*** & & & \\
D & .XX*** & .XX*** & .XX*** & &\\
E & .XX*** & .XX*** & .XX*** & .XX*** & \pnode[0.6em, -1.3ex]{X} \\
\bottomrule
\end{tabular}
\ncline[linewidth = 0.4pt]{A}{X}
\end{postscript}

\end{document}


• That's a quite good solution, perfect! However, using TeXStudio and trying to compile this, it results in an error (Package auto-pst-pdf Error: . Or turn off auto-pst-pdf.}). If I set it on XeLaTeX, it works but then other issues occur (wrong signs etc.)
– Jens
Jan 31, 2019 at 21:38
• I compiled this with xelatex. Did you obtain these wrong signs with exactly this code? Jan 31, 2019 at 21:40
• yes, but in the whole document, not in this table - sorry, if this is offtopic!
– Jens
Jan 31, 2019 at 21:42
• Could ypu post a minimal (yet complete) code reproducing your problems? Jan 31, 2019 at 21:43
• I will try this tomorrow! Thanks so far for your help!
– Jens
Jan 31, 2019 at 21:47

Here is a solution with {NiceTabular} of nicematrix. That environment is similar to the classical environment {tabular} (of the package array) but creates also PGF/Tikz under the cells, rows and columns. It's possible to use those nodes to draw whatever rule you want with Tikz in the \CodeAfter).

\documentclass{article}
\usepackage{booktabs}
\usepackage{nicematrix,tikz}

\begin{document}

\begin{NiceTabular}{rrrrrr}
\toprule
& AAAAA & BBBBBBBB & CCCCC & DDDDDD & EEEEEE \\
\midrule
A \\
B & .XX*** \\
C & .XX*** & .XX*** \\
D & .XX*** & .XX*** & .XX*** \\
E & .XX*** & .XX*** & .XX*** & .XX*** & \\
\bottomrule
\CodeAfter
\tikz \draw (2-|2) -- (last-|last) ;
\end{NiceTabular}

\end{document}


You need several compilations (because of the PGF/Tikz nodes).