[Tex/LaTex] Vertical Lines not appearing in tabularx

tablestabularx

I am trying to make the following table with the table and tabularx packages, but the vertical lines of the last three columns are not appearing.
Can you, please, point me in the right direction?

\documentclass[a4paper]{article}
\usepackage{array, hhline}
\usepackage[showframe]{geometry}
\usepackage{tabularx}

\begin{document}
    \begin{table*}
    \small
    \makebox[3 \textwidth][l]{       %centering table
    \resizebox{0.8 \textwidth}{!}{   %resize table

    \begin{tabularx}{\textwidth}{|c|c|c|c||c|c|c|c||c|c|c|c||c|c|c|c|} 
    \hline
    \multicolumn{4}{|c||}{\textbf{a}} & \multicolumn{4}{|c||}{\textbf{b}} 
    & 
    \multicolumn{4}{|c||}{\textbf{c}} & \multicolumn{4}{|c|}{
    \textbf{d}} \\
    \hline
    aaaaaaa & bbbbbbb & ccccccc & ddddddd & aaaaaaa & bbbbbbb & ccccccc & ddddddd & aaaaaaa & bbbbbbb & ccccccc & ddddddd & aaaaaaa & bbbbbbb & ccccccc & ddddddd\\ 
    \hline\hline
    0.495 & 0.509 & 0.581 & 0.500 & 0.445 & 0.545 & 0.449 & 0.679 & 0.536 & 0.
    600 & 0.392 & 0.736 & 0.509 & 0.454 & 0.500 & 0.500\\ 
    \hline
    0.645 & 0.633 & 0.616 & 0.500 & 0.462 & 0.861 & 0.650 & 0.519 & 0.600 & 0.
    570 & 0.592 & 0.536 & 0.675 & 0.693 & 0.552 & 0.500\\ 
    \hline
    0.549 & 0.489 & 0.500 & 0.500 & 0.572 & 0.510 & 0.457 & 0.467 & 0.578 & 0.447 
    & 0.496 & 0.316 & 0.535 & 0.510 & 0.433 & 0.426\\ 
    \hline
    0.515 & 0.520 & 0.469 & 0.500 & 0.532 & 0.497 & 0.538 & 0.745 & 0.626 & 0.588
    & 0.569 & 0.591 & 0.615 & 0.623 & 0.536 & 0.452\\ 
    \hline
    0.760 & 0.471 & 0.500 & 0.500 & 0.749 & 0.542 & 0.574 & 0.379 & 0.673 & 0.563 
    & 0.544 & 0.483 & 0.613 & 0.425 & 0.500 & 0.500\\ 
    \hline
    0.604 & 0.527 & 0.430 & 0.500 & 0.469 & 0.498 & 0.547 & 0.400 & 0.537 & 0.434
    & 0.522 & 0.397 & 0.518 & 0.436 & 0.500 & 0.500\\ 
    \hline
    0.524 & 0.479 & 0.500 & 0.500 & 0.715 & 0.528 & 0.658 & 0.585 & 0.697 & 0.523 
    & 0.604 & 0.681 & 0.522 & 0.559 & 0.507 & 0.486\\ 
    \hline
    \end{tabularx}
    }   %centering table
    }   %resize table

    \caption{Caption}
    \end{table*}
\end{document}

Thanks

Best Answer

As others have already pointed out, it's simply incorrect to use a tabularx environment without employing at least one column of type X. A separate issue: Since your table has 16 [!] columns, you should give serious thought to displaying the material in landscape format.

The first table in the following screenshot implements fixes to these two concerns.

In addition, you should also be concerned with making the table more readable. Specifically, all these vertical and horizontal lines do nothing to enhance the material's legibility. In fact, one could argue that they reduce legibility. The second table in the following screenshot (hopefully) demonstrates that by using no vertical lines at all and by using fewer, but well-spaced horizontal lines, the table gets a much more "open" look which encourages readers to actually spend some time perusing the tabular material.

\documentclass{article}
\usepackage{tabularx}
\usepackage{rotating}
\usepackage{booktabs} % for well-spaced horizontal rules
\newcolumntype{C}{>{\centering\arraybackslash}X}
\usepackage[letterpaper,margin=1in]{geometry} % set page parameters suitably
\begin{document}

\begin{sidewaystable}
\setlength\tabcolsep{3pt} % default value: 6pt

\begin{tabularx}{\textwidth}{| *{3}{*{4}{C|}|} *{4}{C|} } 
\hline
\multicolumn{4}{|c||}{\textbf{a}} & 
\multicolumn{4}{ c||}{\textbf{b}} & 
\multicolumn{4}{ c||}{\textbf{c}} & 
\multicolumn{4}{ c| }{\textbf{d}} \\
\hline
aaaaaa & bbbbbb & cccccc & dddddd & 
aaaaaa & bbbbbb & cccccc & dddddd & 
aaaaaa & bbbbbb & cccccc & dddddd & 
aaaaaa & bbbbbb & cccccc & dddddd \\ 
\hline\hline
0.495 & 0.509 & 0.581 & 0.500 & 0.445 & 0.545 & 0.449 & 0.679 & 
0.536 & 0.600 & 0.392 & 0.736 & 0.509 & 0.454 & 0.500 & 0.500\\ 
\hline
0.645 & 0.633 & 0.616 & 0.500 & 0.462 & 0.861 & 0.650 & 0.519 & 
0.600 & 0.570 & 0.592 & 0.536 & 0.675 & 0.693 & 0.552 & 0.500\\ 
\hline
0.549 & 0.489 & 0.500 & 0.500 & 0.572 & 0.510 & 0.457 & 0.467 & 
0.578 & 0.447 & 0.496 & 0.316 & 0.535 & 0.510 & 0.433 & 0.426\\ 
\hline
0.515 & 0.520 & 0.469 & 0.500 & 0.532 & 0.497 & 0.538 & 0.745 & 
0.626 & 0.588 & 0.569 & 0.591 & 0.615 & 0.623 & 0.536 & 0.452\\ 
\hline
0.760 & 0.471 & 0.500 & 0.500 & 0.749 & 0.542 & 0.574 & 0.379 & 
0.673 & 0.563 & 0.544 & 0.483 & 0.613 & 0.425 & 0.500 & 0.500\\ 
\hline
0.604 & 0.527 & 0.430 & 0.500 & 0.469 & 0.498 & 0.547 & 0.400 & 
0.537 & 0.434 & 0.522 & 0.397 & 0.518 & 0.436 & 0.500 & 0.500\\ 
\hline
0.524 & 0.479 & 0.500 & 0.500 & 0.715 & 0.528 & 0.658 & 0.585 & 
0.697 & 0.523 & 0.604 & 0.681 & 0.522 & 0.559 & 0.507 & 0.486\\ 
\hline
\end{tabularx}
\caption{Version with lots of vertical and horizontal lines}

\vspace{1cm}

\begin{tabularx}{\textwidth}{@{} c *{14}{C} c @{}} 
\toprule
\multicolumn{4}{@{}c}{\textbf{a}} & 
\multicolumn{4}{   c}{\textbf{b}} & 
\multicolumn{4}{   c}{\textbf{c}} & 
\multicolumn{4}{c@{}}{\textbf{d}} \\
\cmidrule(r){1-4}   \cmidrule(lr){5-8}
\cmidrule(lr){9-12} \cmidrule(l){13-16}
aaaaaa & bbbbbb & cccccc & dddddd & 
aaaaaa & bbbbbb & cccccc & dddddd & 
aaaaaa & bbbbbb & cccccc & dddddd & 
aaaaaa & bbbbbb & cccccc & dddddd \\ 
\midrule
0.495 & 0.509 & 0.581 & 0.500 & 0.445 & 0.545 & 0.449 & 0.679 & 
0.536 & 0.600 & 0.392 & 0.736 & 0.509 & 0.454 & 0.500 & 0.500\\ 
0.645 & 0.633 & 0.616 & 0.500 & 0.462 & 0.861 & 0.650 & 0.519 & 
0.600 & 0.570 & 0.592 & 0.536 & 0.675 & 0.693 & 0.552 & 0.500\\ 
0.549 & 0.489 & 0.500 & 0.500 & 0.572 & 0.510 & 0.457 & 0.467 & 
0.578 & 0.447 & 0.496 & 0.316 & 0.535 & 0.510 & 0.433 & 0.426\\ 
0.515 & 0.520 & 0.469 & 0.500 & 0.532 & 0.497 & 0.538 & 0.745 & 
0.626 & 0.588 & 0.569 & 0.591 & 0.615 & 0.623 & 0.536 & 0.452\\
0.760 & 0.471 & 0.500 & 0.500 & 0.749 & 0.542 & 0.574 & 0.379 & 
0.673 & 0.563 & 0.544 & 0.483 & 0.613 & 0.425 & 0.500 & 0.500\\ 
0.604 & 0.527 & 0.430 & 0.500 & 0.469 & 0.498 & 0.547 & 0.400 & 
0.537 & 0.434 & 0.522 & 0.397 & 0.518 & 0.436 & 0.500 & 0.500\\ 
0.524 & 0.479 & 0.500 & 0.500 & 0.715 & 0.528 & 0.658 & 0.585 & 
0.697 & 0.523 & 0.604 & 0.681 & 0.522 & 0.559 & 0.507 & 0.486\\ 
\bottomrule
\end{tabularx}
\caption{Version with no vertical rules and with fewer but well-spaced horizontal rules}
\end{sidewaystable}
\end{document}

Related Solutions

[Tex/LaTex] TabularX vertical alignment

Just put the \renewcommand line immediately before the \tabularx it will be scoped by the surrounding parameters element.

 \newenvironment{parameters}
      {Parameters:\\
       \renewcommand\tabularxcolumn[1]{m{##1}}%
       \tabularx{\linewidth}{>{\raggedright\arraybackslash}p{0.3cm}X@{}}    }
      {\endtabularx}

[Tex/LaTex] vertical alignment using tabularx / arraystretch

enter image description here

You had

Overfull \hbox (10.00002pt too wide) in paragraph at lines 34--35

As your table was full width but indented by paragraph indent (10pt) I added \noindent.

You do not have to use @{} ever but if you do use it (or |) you need to be consistent. | adds a rule and @{} removes the usual inter-column padding which by default also appears before the first and after the last column. If you use these you need to use them also in the \multicolumn specifications so that the spanning columns get the same inter-column space as the columns they span.

(update Note the use of an l cell to ensure baseline alignment of the headings)

It's a bit unusual to put Table:.. in the table rather than have a separate caption, but I left it like that:

 \documentclass[fleqn,10pt,twocolumn]{article} % Document font size and equations 
  \usepackage{tabularx}
  \usepackage[table]{xcolor}
  \usepackage{colortbl}
  \usepackage{enumitem}
  \renewcommand\tabularxcolumn[1]{m{#1}}
  \renewcommand\arraystretch{1.5} \setlength\minrowclearance{2.4pt} 

  \arrayrulecolor{blue}

  \newcolumntype{=}{>{\global\let\currentrowstyle\relax}}
  \newcolumntype{^}{>{\currentrowstyle}}
  \newcommand{\rowstyle}[1]{\gdef\currentrowstyle{#1}%
    #1\ignorespaces
  }


  \begin{document}

  \noindent X\dotfill X

  \noindent
  \begin{tabularx}{\linewidth}{@{}|=l^X|@{}}
  \multicolumn{2}{@{}|>{\columncolor{blue}}c|@{}}{\color{white}\textbf{Table: Interfaces}} \\
  \hline
  \rowcolor{blue}
  \rowstyle{\color{white}\bfseries}
  \textbf{Interface} &\multicolumn{1}{l|@{}}{\textcolor{white}{\textbf{Programming Languages}}}\\
  \texttt{.NET}
   & The blablab this is only some text to illustrate my problem:
   \begin{itemize}[topsep=-5pt,leftmargin=0.7cm,itemsep=0.8pt,labelsep=.5cm]
   \item C\#
   \item VB .NET
   \end{itemize}\\
  \texttt{JNI}
  & Some other text \\
   \hline
  \end{tabularx}
  \end{document}

Best Answer

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[Tex/LaTex] TabularX vertical alignment

[Tex/LaTex] vertical alignment using tabularx / arraystretch

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