4

In my table I use different combinations of a checkmark standing alone, in parentheses, or with an asterisk. I would like to have a centered column in which the checkmarks align.

By using the package dcolumn and defining the checkmark as decimal point I get the desired alignment. However, when running this through pdfLaTeX I encounter two problems:

  1. \ding{51} is not printed correctly even though I loaded the package pifont.
  2. The column is not center aligned anymore.

Why does this happen and how can I get the desired result?

\documentclass[a5paper, 11pt]{scrbook}

\usepackage{pifont}
\usepackage{tabularx}
\usepackage{booktabs}
\usepackage{dcolumn}
\newcolumntype{A}{D{.}{\ding{51}}{-1}}

\begin{document}

\begin{table}
\centering
 \begin{tabularx}{\textwidth}{Xc}
 \textbf{Element} & \textbf{Availability}\\
 \midrule
 Some Element & \ding{51}\\ 
 Another Element & \ding{51}\textsuperscript{\textasteriskcentered}\\
 Yet Another Element & (\ding{51})\\
 One More Element & (\ding{51}\textsuperscript{\textasteriskcentered})\\
 \end{tabularx}
\caption{Unaligned example table}
\end{table}

\begin{table}
\centering
 \begin{tabularx}{\textwidth}{XA}
 \textbf{Element} & \textbf{Availability}\\
 \midrule
 Some Element & .\\
 Another Element & .\textsuperscript{\textasteriskcentered}\\
 Yet Another Element & (.)\\
 One More Element & (.\textsuperscript{\textasteriskcentered})\\
 \end{tabularx}
\caption{Aligned example table, but with problems displaying the checkmark and messed up centering.}
\end{table}

\end{document}
7

The problem is that columns of type D from the dcolumn package always use math mode, and \ding{51} in math mode is printed as 3.

So, you can force its contents to be in text mode, substituting the line

\newcolumntype{A}{D{.}{\ding{51}}{-1}}

with

\newcolumntype{A}{D{.}{\textrm{\ding{51}}}{-1}}

Note that, for the same reason, you can substitute \textsuperscript{\textasteriskcentered} with ^*

To keep the first line centered use \multicolumn, otherwise it will check for the alignment point.

MWE:

\documentclass[a5paper, 11pt]{scrbook}

\usepackage{pifont}
\usepackage{tabularx}
\usepackage{booktabs}
\usepackage{dcolumn}
\newcolumntype{A}{D{.}{\textrm{\ding{51}}}{-1}}

\begin{document}

\begin{table}
\centering
 \begin{tabularx}{\textwidth}{Xc}
 \textbf{Element} & \textbf{Availability}\\
 \midrule
 Some Element & \ding{51}\\
 Another Element & \ding{51}\textsuperscript{\textasteriskcentered}\\
 Yet Another Element & (\ding{51})\\
 One More Element & (\ding{51}\textsuperscript{\textasteriskcentered})\\
 \end{tabularx}
\caption{Unaligned example table}
\end{table}

\begin{table}
\centering
 \begin{tabularx}{\textwidth}{XA}
 \textbf{Element} & \multicolumn{1}{c}{\textbf{Availability}}\\
 \midrule
 Some Element & .\\
 Another Element & .^*\\
 Yet Another Element & (.)\\
 One More Element & (.^*)\\
 \end{tabularx}
\caption{Aligned example table, but with problems displaying the checkmark and messed up centering.}
\end{table}

\end{document} 

Output:

enter image description here

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