[Tex/LaTex] Centering contents of table cells horizontally and vertically

horizontal alignmentmulticolmultirowtablesvertical alignment

I'd appreciate help centering the contents of the topmost row vertically and horizontally in their cells(?). I've tried using \multicolumn without luck.

    \documentclass[10pt,a4paper]{scrreprt}

    \usepackage{classicthesis-ldpkg}
    \usepackage{multicol}
    \usepackage{multirow}
    \usepackage{rotating}

    \begin{document}

            \begin{sidewaystable}
             \centering
                \renewcommand\multirowsetup{\centering}
                \begin{tabular}{|>{\centering}p{20mm}|>{\centering}p{18mm}|>{\centering}p{20mm}|>{\centering}p{18mm}|>{\centering}p{20mm}|>{\centering}p{20mm}|>{\centering}m{15mm}|>{\centering}m{20mm}|>{\centering}m{15mm}|m{20mm}<{\centering}|} \hline
                \multirow{2}{20mm}{Head Model} & \# SG computed & \# Computed directly & \# SG Corrected & \# SG Approximated & SMAS triangle count & \multicolumn{2}{>{\centering}p{35mm}|}{Machine~1} & \multicolumn{2}{>{\centering}p{35mm}|}{Machine~2} \\ \cline{7-10}
                 & & & & & & Runtime & \% spent calc geodesics  & Runtime & \% spent calc geodesics \\ \hline
                African & 1102 & 994 & 102 & 56 & -- & 499~sec. (8.3~min.) & 77\% & -- & -- \\ \hline
                \end{tabular}
            \end{sidewaystable}        
    \end{document}

Best Answer

Use \multirow with the appropriate value in the first argument:

\documentclass[10pt,a4paper]{scrreprt}
\usepackage{classicthesis-ldpkg}
\usepackage{multicol}
\usepackage{multirow}
\usepackage{rotating}

\newcolumntype{P}[1]{>{\centering\arraybackslash}p{#1}}
\newcolumntype{M}[1]{>{\centering\arraybackslash}m{#1}}

\begin{document}

\begin{sidewaystable}
  \centering
  \renewcommand\multirowsetup{\centering}
  \begin{tabular}{|M{20mm}|P{18mm}|P{20mm}|P{18mm}|P{20mm}|P{20mm}|M{15mm}|M{20mm}|M{15mm}|M{20mm}|} \hline
    \multirow{3}{20mm}{Head Model} & \multirow{3}{20mm}{\# SG computed} 
      & \multirow{3}{20mm}{\# Computed directly} & \multirow{3}{20mm}{\# SG Corrected} 
      & \multirow{3}{20mm}{\# SG Approximated} & \multirow{3}{20mm}{SMAS triangle count} 
      & \multicolumn{2}{P{35mm}|}{Machine~1} 
      & \multicolumn{2}{P{35mm}|}{Machine~2} \\ \cline{7-10}
    & & & & & & Runtime & \% spent calc geodesics  & Runtime & \% spent calc geodesics \\ \hline
    African & 1102 & 994 & 102 & 56 & -- & 499~sec. (8.3~min.) & 77\% & -- & -- \\ \hline
  \end{tabular}
\end{sidewaystable}        

\end{document}

Avoiding vertical rules in a table is a good practice; in this regard, the booktabs package would be of interest.

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