Horizontal text alignment in a cell in a wide table

Question

I have this table in my document, and as you can see the numbers in the second row are not centered, I tried to use some solutions from previously asked questions but none of them fixed this.

The LaTeX code of this table is:

\documentclass[xcolor=table]{beamer}

\usepackage{array}
\newcolumntype{P}[1]{>{\parbox{20em}}m{#1}}

\begin{document}
\begin{table}[]
\centering

\begin{tabular}{cccccc|P{0.02cm}|
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |
        >{\columncolor[HTML]{FD6864}}P{0.02cm} |}
    \cline{7-34}
    \multicolumn{1}{l}{}                                & \multicolumn{1}{l}{}                                   & \multicolumn{1}{l}{}                            & \multicolumn{1}{l}{}                             & \multicolumn{1}{l}{}                            & \multicolumn{1}{l|}{}                            & \multicolumn{28}{c|}{\cellcolor[HTML]{C0C0C0}\textbf{Something}}                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    \\ \hline
    \multicolumn{1}{|l|}{\cellcolor[HTML]{C0C0C0}One} & \multicolumn{1}{l|}{\cellcolor[HTML]{C0C0C0}Two} & \multicolumn{1}{l|}{\cellcolor[HTML]{C0C0C0}Three} & \multicolumn{1}{l|}{\cellcolor[HTML]{C0C0C0}Four} & \multicolumn{1}{l|}{\cellcolor[HTML]{C0C0C0}Five} & \multicolumn{1}{l|}{\cellcolor[HTML]{C0C0C0}Six} & \cellcolor[HTML]{C0C0C0}1 & \cellcolor[HTML]{C0C0C0}2 & \cellcolor[HTML]{C0C0C0}3 & \cellcolor[HTML]{C0C0C0}4 & \cellcolor[HTML]{C0C0C0}5 & \cellcolor[HTML]{C0C0C0}6 & \cellcolor[HTML]{C0C0C0}7 & \cellcolor[HTML]{C0C0C0}8 & \cellcolor[HTML]{C0C0C0}9 & \cellcolor[HTML]{C0C0C0}10 & \cellcolor[HTML]{C0C0C0}11 & \cellcolor[HTML]{C0C0C0}12 & \cellcolor[HTML]{C0C0C0}13 & \cellcolor[HTML]{C0C0C0}14 & \cellcolor[HTML]{C0C0C0}15 & \cellcolor[HTML]{C0C0C0}16 & \cellcolor[HTML]{C0C0C0}17 & \cellcolor[HTML]{C0C0C0}18 & \cellcolor[HTML]{C0C0C0}19 & \cellcolor[HTML]{C0C0C0}20 & \cellcolor[HTML]{C0C0C0}21 & \cellcolor[HTML]{C0C0C0}22 & \cellcolor[HTML]{C0C0C0}23 & \cellcolor[HTML]{C0C0C0}24 & \cellcolor[HTML]{C0C0C0}25 & \cellcolor[HTML]{C0C0C0}26 & \cellcolor[HTML]{C0C0C0}27 & \cellcolor[HTML]{C0C0C0}28 \\ \hline
    \multicolumn{1}{|c|}{I}                             & \multicolumn{1}{c|}{-----}                             & \multicolumn{1}{c|}{5}                          & \multicolumn{1}{c|}{43}                       & \multicolumn{1}{c|}{3}                          & 0                                                & \cellcolor[HTML]{32CB00}  &                           &                           &                           &                           &                           &                           &                           &                           &                            &                            &                            &                            &                            &                            & \cellcolor[HTML]{32CB00}   &                            &                            &                            &                            & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   &                            &                            &                            &                            &                            & \cellcolor[HTML]{32CB00}   \\ \hline
    \multicolumn{1}{|c|}{II}                            & \multicolumn{1}{c|}{0}                              & \multicolumn{1}{c|}{4}                         & \multicolumn{1}{c|}{5}                       & \multicolumn{1}{c|}{2}                         & 3                                            & \cellcolor[HTML]{32CB00}  & \cellcolor[HTML]{32CB00}  & \cellcolor[HTML]{32CB00}  & \cellcolor[HTML]{32CB00}  & \cellcolor[HTML]{32CB00}  & \cellcolor[HTML]{32CB00}  &                           & \cellcolor[HTML]{32CB00}  & \cellcolor[HTML]{32CB00}  & \cellcolor[HTML]{32CB00}   &                            & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   &                            & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   & \cellcolor[HTML]{32CB00}   &                            \\ \hline
    \multicolumn{1}{|c|}{III}                           & \multicolumn{1}{c|}{0}                                 & \multicolumn{1}{c|}{0}                          & \multicolumn{1}{c|}{0}                           & \multicolumn{1}{c|}{0}                          & 0                                                & \cellcolor[HTML]{FD6864}  &                           &                           &                           &                           &                           &                           &                           &                           &                            &                            &                            &                            &                            &                            & \cellcolor[HTML]{FD6864}   &                            &                            &                            &                            & \cellcolor[HTML]{FD6864}   & \cellcolor[HTML]{FD6864}   &                            &                            &                            &                            &                            &                            \\ \hline
    \multicolumn{1}{|c|}{IV}                            & \multicolumn{1}{c|}{0}                                 & \multicolumn{1}{c|}{0}                          & \multicolumn{1}{c|}{0}                           & \multicolumn{1}{c|}{0}                          & 0                                                & \cellcolor[HTML]{FD6864}  &                           &                           &                           &                           &                           &                           &                           &                           &                            &                            &                            &                            &                            &                            & \cellcolor[HTML]{FD6864}   &                            &                            &                            &                            & \cellcolor[HTML]{FD6864}   & \cellcolor[HTML]{FD6864}   &                            &                            &                            &                            &                            &                            \\ \hline
    \multicolumn{1}{|c|}{V}                             & \multicolumn{1}{c|}{0}                                 & \multicolumn{1}{c|}{0}                          & \multicolumn{1}{c|}{0}                           & \multicolumn{1}{c|}{0}                          & 0                                                & \cellcolor[HTML]{FD6864}  &                           &                           &                           &                           &                           &                           &                           &                           &                            &                            &                            &                            &                            &                            & \cellcolor[HTML]{FD6864}   &                            &                            &                            &                            & \cellcolor[HTML]{FD6864}   & \cellcolor[HTML]{FD6864}   &                            &                            &                            &                            &                            &                            \\ \hline
\end{tabular}

\end{table}

\end{document}

Does someone have a solution?

Welcome to TeX.SX! Please turn your code fragment into a compilable minimal working example (MWE) that includes the documentclass and all relevant packages that are needed to reproduce the shown output. (How is the P type column defined? ...) Apart from that, you might be interested in How to create fixed width table columns with text raggedright/centered/raggedleft? — leandriis, Jan 27 '19 at 13:41
Apart from my previous comment, a table with more than 30 columns is most likely a lot wider than the textwidth and will not fit onto yor frame even if you use an extremely small fontsize and tabcolsep. You might also want to define a custom command instead of using \cellcolor[HTML]{C0C0C0} and others over and over again. That way it would be easier if you want to change a color later on. — leandriis, Jan 27 '19 at 13:49
Thanks for your edit. It looks like you've got two separate accounts.The Stack Exchange staff can merge them together for you. — leandriis, Jan 27 '19 at 14:36
0.02cm = 0.2mm is too small for any readable font to fit. So TeX adds \tabcolsep on both sides of this extremely narrow column, also placing the cell contents immediately following the \tabcolsep. So, things seem to fit, but it's actually only because of the \tabcolsep on both sides. — Werner, Dec 31 '19 at 03:46

score 1 · Answer 1 · answered Dec 31 '19 at 06:29

The numbers aren't centered because the columns are too narrow. Below I've used collcell to collect the cell entries and put them inside a zero-width box. That way they seem to be centered within your 0.2mm columns.

\documentclass{article}

\usepackage[
  margin=1in,
  landscape
]{geometry}% Just for this example

\usepackage[table]{xcolor}
\usepackage{collcell}
\newcommand{\centercell}{\makebox[0pt]}
\newcolumntype{P}[1]{>{\collectcell\centercell}m{#1}<{\endcollectcell}}

\begin{document}

\begin{tabular}{ *{6}{c} | *{28}{>{\columncolor[HTML]{FD6864}}P{0.2mm} |} }
  \cline{7-34}
  \multicolumn{1}{l}{} & \multicolumn{1}{l}{} & \multicolumn{1}{l}{} & 
    \multicolumn{1}{l}{} & \multicolumn{1}{l}{} & \multicolumn{1}{l|}{} & 
    \multicolumn{28}{c|}{\cellcolor[HTML]{C0C0C0}\textbf{Something}} \\
  \hline
  \multicolumn{1}{|l|}{\cellcolor[HTML]{C0C0C0}One} & 
    \multicolumn{1}{l|}{\cellcolor[HTML]{C0C0C0}Two} & 
    \multicolumn{1}{l|}{\cellcolor[HTML]{C0C0C0}Three} & 
    \multicolumn{1}{l|}{\cellcolor[HTML]{C0C0C0}Four} & 
    \multicolumn{1}{l|}{\cellcolor[HTML]{C0C0C0}Five} & 
    \multicolumn{1}{l|}{\cellcolor[HTML]{C0C0C0}Six} & 
  \cellcolor[HTML]{C0C0C0}1 & \cellcolor[HTML]{C0C0C0}2 & \cellcolor[HTML]{C0C0C0}3 & 
    \cellcolor[HTML]{C0C0C0}4 & \cellcolor[HTML]{C0C0C0}5 & \cellcolor[HTML]{C0C0C0}6 & 
    \cellcolor[HTML]{C0C0C0}7 & \cellcolor[HTML]{C0C0C0}8 & \cellcolor[HTML]{C0C0C0}9 & 
    \cellcolor[HTML]{C0C0C0}10 & \cellcolor[HTML]{C0C0C0}11 & \cellcolor[HTML]{C0C0C0}12 & 
    \cellcolor[HTML]{C0C0C0}13 & \cellcolor[HTML]{C0C0C0}14 & \cellcolor[HTML]{C0C0C0}15 & 
    \cellcolor[HTML]{C0C0C0}16 & \cellcolor[HTML]{C0C0C0}17 & \cellcolor[HTML]{C0C0C0}18 & 
    \cellcolor[HTML]{C0C0C0}19 & \cellcolor[HTML]{C0C0C0}20 & \cellcolor[HTML]{C0C0C0}21 & 
    \cellcolor[HTML]{C0C0C0}22 & \cellcolor[HTML]{C0C0C0}23 & \cellcolor[HTML]{C0C0C0}24 & 
    \cellcolor[HTML]{C0C0C0}25 & \cellcolor[HTML]{C0C0C0}26 & \cellcolor[HTML]{C0C0C0}27 & 
    \cellcolor[HTML]{C0C0C0}28 \\
  \hline
  \multicolumn{1}{|c|}{I} & \multicolumn{1}{c|}{-----} & \multicolumn{1}{c|}{5} & 
    \multicolumn{1}{c|}{43} & \multicolumn{1}{c|}{3} & 0 & \cellcolor[HTML]{32CB00} & 
      & & & & & & & & & & & & & & \cellcolor[HTML]{32CB00} & & & & & \cellcolor[HTML]{32CB00} & 
      \cellcolor[HTML]{32CB00} & & & & & & \cellcolor[HTML]{32CB00} \\
  \hline
  \multicolumn{1}{|c|}{II} & \multicolumn{1}{c|}{0} & \multicolumn{1}{c|}{4} & 
    \multicolumn{1}{c|}{5} & \multicolumn{1}{c|}{2} & 3 & \cellcolor[HTML]{32CB00} &
    \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & 
    \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & & \cellcolor[HTML]{32CB00} &
    \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & & \cellcolor[HTML]{32CB00} & 
    \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & 
    \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & 
    \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & 
    \cellcolor[HTML]{32CB00} & & \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & 
    \cellcolor[HTML]{32CB00} & \cellcolor[HTML]{32CB00} & \\
  \hline
  \multicolumn{1}{|c|}{III} & \multicolumn{1}{c|}{0} & \multicolumn{1}{c|}{0} & 
    \multicolumn{1}{c|}{0} & \multicolumn{1}{c|}{0} & 0 & \cellcolor[HTML]{FD6864} & 
    & & & & & & & & & & & & & & \cellcolor[HTML]{FD6864} & & & & & \cellcolor[HTML]{FD6864} & 
    \cellcolor[HTML]{FD6864} & & & & & & \\
  \hline
  \multicolumn{1}{|c|}{IV} & \multicolumn{1}{c|}{0} & \multicolumn{1}{c|}{0} & 
    \multicolumn{1}{c|}{0} & \multicolumn{1}{c|}{0} & 0 & \cellcolor[HTML]{FD6864} &
    & & & & & & & & & & & & & & \cellcolor[HTML]{FD6864} & & & & & \cellcolor[HTML]{FD6864} & 
    \cellcolor[HTML]{FD6864} & & & & & & \\
  \hline
  \multicolumn{1}{|c|}{V} & \multicolumn{1}{c|}{0} & \multicolumn{1}{c|}{0} & 
    \multicolumn{1}{c|}{0} & \multicolumn{1}{c|}{0} & 0 & \cellcolor[HTML]{FD6864} & 
    & & & & & & & & & & & & & & \cellcolor[HTML]{FD6864} & & & & & \cellcolor[HTML]{FD6864} & 
    \cellcolor[HTML]{FD6864} & & & & & & \\
  \hline
\end{tabular}

\end{document}

Note the code simplification for defining multiple columns with the same specification: *{<num>}{<col spec>}. Not only does it simplify the input, but it makes it more maintainable.

Horizontal text alignment in a cell in a wide table

1 Answers1