[Tex/LaTex] How to vertically center contents of table cells

tablesvertical alignment

I don't really understand how I can vertically align the contents of my table. They seem to be all messed up, and I dont know why. Here is a screenshot showing the problem:

And here is the code I am currently using to produce the shown table:

\documentclass{beamer}
\usetheme{Malmoe}
\title{Tex Stack Exchange example}
\subject{Question about vertical centering tables}
\usepackage{array}
\newcolumntype{L}[1]{>{\raggedright\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\newcolumntype{C}[1]{>{\centering\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\newcolumntype{R}[1]{>{\raggedleft\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\setlength\extrarowheight{4pt}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\begin{frame}{Statistics}{}
\tiny
\begin{center}
\begin{tabular}{| L{1.8cm} | C{0.8cm} | C{0.8cm} | C{0.8cm} | C{0.8cm} | C{0.8cm}| C{0.8cm} | C{0.8cm} |}
\hline
Scenario & Number of events & Number of clusters & Number of healthy clusters & Number of unhealthy clusters & Number of clusters pairs & Number of real cluster pairs & Number of fake cluster pairs \\
\hline
Eff. 76\%  total/module 1/module 4 & 9079 & 36855956 2191062 2917431 & 30235384 495474 1781164 & 6620572 1695588 1136267 & 1347578 513532 92623 & 28242 3407 4090 & 1319336 510125 88533  \\
\hline
Eff. 90\%  total/module 1/module 4 & 8285 & 33935939 1926868 2923980 & 29137926 711464 2148856 & 4798013 1215404 775124 & 1063412 397880 72455 & 26928 3100 4307 & 1036484 394780 68148  \\
\hline
Eff. 100\% total/module 1/module 4 & 9883 & 40379644 214092 366267 & 36443709 119498 3085536 & 3935935 945942 577141 & 896456 320005 59953 & 32121 3484 5551 & 864335 316521 54402  \\
\hline
\end{tabular}
\end{center}
\end{frame}

\end{document}

Can you help me what I should do about the array box centering to fix the "messed up" alignment in the table cells? Thank you in advance!

Best Answer

I suggest you

remove the instructions \let\newline\\ and \hspace{0pt} from the definitions of the L, C, and R column types and
set \extrarowheight to a more reasonable value, say,
```
\setlength\extrarowheight{2pt}
```

A revised MWE -- I've changed some of the columns widths to allow proper centering of the material.

\documentclass{beamer}
\usetheme{Malmoe}
\usepackage{array}
\newcolumntype{L}[1]{>{\raggedright\arraybackslash}m{#1}}
\newcolumntype{C}[1]{>{\centering\arraybackslash}m{#1}}
\setlength\extrarowheight{2pt} % 4pt seems excessive...

\begin{document}

\begin{frame}{Statistics}{}
\tiny
\centering
\begin{tabular}{| L{1.7cm} | C{0.7cm} | C{0.9cm} | *{5}{C{0.8cm}|} }
\hline
Scenario & Number of events & Number of clusters & Number of healthy clusters & Number of unhealthy clusters & Number of cluster pairs & Number of real cluster pairs & Number of fake cluster pairs \\
\hline
Eff.\ 76\%~total\slash module~1\slash module~4 & 9079 & 36855956 2191062 2917431 & 30235384 495474 1781164 & 6620572 1695588 1136267 & 1347578 513532 92623 & 28242 3407 4090 & 1319336 510125 88533  \\
\hline
Eff.\ 90\%~total\slash module~1\slash module~4 & 8285 & 33935939 1926868 2923980 & 29137926 711464 2148856 & 4798013 1215404 775124 & 1063412 397880 72455 & 26928 3100 4307 & 1036484 394780 68148  \\
\hline
Eff.\ 100\%~total\slash module~1\slash module~4 & 9883 & 40379644 214092 366267 & 36443709 119498 3085536 & 3935935 945942 577141 & 896456 320005 59953 & 32121 3484 5551 & 864335 316521 54402  \\
\hline
\end{tabular}
\end{frame}

\end{document}

Related Solutions

[Tex/LaTex] How to vertically-center the text of the cells

Edit: The existence of this new answer has made my answer now obsolete and embarrassing. Please proceed to the new answer and vote it up.

enter image description here

\documentclass{article}
\usepackage[a4paper,vmargin=2cm,hmargin=1cm,showframe]{geometry}
\usepackage[demo]{graphicx}
\usepackage[table]{xcolor}
\usepackage{array}
\usepackage{longtable}

\parindent=0pt

\def\correction#1{%
    \abovedisplayshortskip=#1\baselineskip\relax\belowdisplayshortskip=#1\baselineskip\relax%
    \abovedisplayskip=#1\baselineskip\relax\belowdisplayskip=#1\baselineskip\relax}

\arrayrulewidth=1pt\relax
\tabcolsep=5pt\relax
\arrayrulecolor{red}
\fboxsep=\tabcolsep\relax
\fboxrule=\arrayrulewidth\relax

\newcolumntype{A}[2]{%
    >{\minipage{\dimexpr#1\linewidth-2\tabcolsep-#2\arrayrulewidth\relax}\vspace\tabcolsep}%
    c<{\vspace\tabcolsep\endminipage}}
    

\newenvironment{Table}[4]{%
    \longtable{%
        |A{#1}{1.5}% for figure
        |>{\centering$\displaystyle}A{#2}{1}<{$}% for inline equation
        |>{\correction{-1}\strut\[}A{#3}{1}<{\]\strut}% for displayed equation
        |>{\centering}A{#4}{1.5}% for text
        |}\hline\ignorespaces}{%
    \endlongtable\ignorespacesafterend}

\newcommand{\dummy}{%
    It is practically a big lie that \LaTeX\ 
    makes you focus on the content without
    bothering about the layout.}


\newcommand{\Row}{%
    \includegraphics[width=\linewidth]{newton}&
    \frac{a+b}{a-b}=0&
    \int_a^b f(x)\, \textrm{d}x=\frac{b-a}{b+a}&
    \fcolorbox{cyan}{yellow}{\parbox{\dimexpr\linewidth-2\fboxsep-2\fboxrule\relax}{\dummy}}
    \tabularnewline\hline}

\begin{document}
\begin{Table}{0.25}{0.25}{0.25}{0.25}
\Row
\Row
\end{Table}

\def\x{\centering$\displaystyle\int_a^bf(x)\,\textrm{d}x=\frac{a-b}{a+b}$}

\longtable{|A{0.2}{1.5}*2{|A{0.25}{1}}|A{0.3}{1.5}|}\hline
\x & \x & \multicolumn{2}{A{0.55}{1.5}|}{\x} \tabularnewline\hline
\multicolumn{2}{|A{0.45}{1.5}|}{\x} & \x & \x\tabularnewline\hline 
\x & \multicolumn{2}{A{0.5}{1}|}{\x} & \x\tabularnewline\hline 
\multicolumn{4}{|A{1}{2}|}{\x}\tabularnewline\hline 
\endlongtable
\end{document}

[Tex/LaTex] Vertically center cells of a table

Vertically centering cell entries is possible via the m{<width>} column type from the array package. Horizontal centering is obtained by prepending the column entries with \centering\arraybackslash (also supported by array). For completeness and brevity, the MWE below defines the new column type M which does all of the above:

enter image description here

\documentclass[a4paper]{article}
%\usepackage{showframe}% http://ctan.org/pkg/showframe
\usepackage[margin=1.0in]{geometry}% http://ctan.org/pkg/margin
\usepackage{booktabs}% http://ctan.org/pkg/booktabs
\usepackage{array}% http://ctan.org/pkg/array
\newcolumntype{M}{>{\centering\arraybackslash}m{\dimexpr.25\linewidth-2\tabcolsep}}
\begin{document}
\begin{table}[ht]
  \centering
  \begin{tabular}{MMMM}
    \toprule
    A & B & D & E \\
    \midrule
    \rule{15pt}{10pt} & One & Two & Three \\ 
    \rule{15pt}{10pt} & Three & One & Two \\ 
    \rule{15pt}{10pt} & Two & Three & One \\ 
    \bottomrule
  \end{tabular}
\end{table}
\end{document}

For images, I've used \rule{15pt}{10pt}, although the above solution works for any image size.

The table width is also chosen to fit exactly within the text block, making each of the four columns the same width (.25\linewidth-2\tabcolsep). To see this, uncomment the showframe package which highlights the text block boundary.

Best Answer

Related Solutions

[Tex/LaTex] How to vertically-center the text of the cells

[Tex/LaTex] Vertically center cells of a table

Related Question