You are probably looking for the following layout:
\documentclass[a4paper,10pt]{article}
\usepackage{booktabs}% http://ctan.org/pkg/booktabs
\begin{document}
\begin{table}[htbp]
\centering
\caption{Case-studies}
\begin{tabular}{*{11}{l}}
\toprule
& & & \multicolumn{2}{c}{Full} & \multicolumn{2}{c}{Full}
& \multicolumn{2}{c}{Full} & \multicolumn{2}{c}{Full} \\
\cmidrule(lr){4-5}
\cmidrule(lr){6-7}
\cmidrule(lr){8-9}
\cmidrule(lr){10-11}
Name & Name & Name & Name & Name. & Name & Name. & Name & Name. & Name & Name. \\
\midrule
John & Doe & $7.5$ \\
Richard & Miles & $2$ \\
\bottomrule
\end{tabular}
\label{case-studies}
\end{table}
\end{document}
Note that the table caption is not properly aligned since the tabular structure is too wide. If need be, you can adjust the column separation which provides a tighter view and possibly make the table fit within the page boundary.
The default of \tabcolsep is 6pt. Anything smaller will shrink the tabular horizontally. Using something like \setlength{\tabcolsep}{3pt}. You could also consider increasing the text block margin using geometry.
Since the whole outer cell, which contains \specialcell should be bold, \bfseries can be specified in the outer cell, right before \specialcell:
... & \bfseries\specialcell{...} & ...
This can also be put into a macro \specialcellbold, see the following example:
\documentclass{report}
\usepackage{booktabs}
\usepackage{array}
\newcommand*\rotbf[1]{\rotatebox{90}{\textbf{#1}}}
\newcommand{\specialcell}[2][c]{\begin{tabular}[#1]{@{}l@{}}#2\end{tabular}}
\newcommand{\specialcellbold}[2][c]{%
\bfseries
\begin{tabular}[#1]{@{}l@{}}#2\end{tabular}%
}
\begin{document}
\begin{table}[hbr]
\centering
\label{tbl:heatwheel_res}
\begin{tabular}{llll}
\toprule
\textbf{Parameter} &
\specialcellbold{Exhaust\\air} &
\specialcellbold{Exhaust and\\ outdoor air} &
\specialcellbold{Heat wheel\\(80~\%)} \\
\midrule
Heat recovery [\%] & 89,6 \% & 89,6 \% & 77,4 \% \\
Real heat recovery [\%] & 50,5 \% & 52,1 \% & - \\
Net energy need for VH and SH & 27,7 & 27,0 & 15,8 \\
\specialcell{Delivered energy for\\DHW, VH and SH} & 31,1 & 27,6 & 45,6 \\
\bottomrule
\end{tabular}
\end{table}
\end{document}
The table formatted a little different:
\documentclass{report}
\usepackage{booktabs}
% \usepackage{array}% It can also be loaded explicitly, implicitly it is
% loaded by siunitx
\usepackage{siunitx}
% \sisetup{output-decimal-marker={,}}% OP now wants to have the default dot
\sisetup{detect-weight, mode=text}
\newcommand*\rotbf[1]{\rotatebox{90}{\textbf{#1}}}
\newcommand{\specialcell}[2][b]{\begin{tabular}[#1]{@{}c@{}}#2\end{tabular}}
\newcommand{\specialcellbold}[2][b]{%
\bfseries
\sisetup{text-rm=\bfseries}%
\begin{tabular}[#1]{@{}c@{}}#2\end{tabular}%
}
\newcommand*{\leftspecialcell}[2][b]{%
\begin{tabular}[#1]{@{}l@{}}#2\end{tabular}%
}
\begin{document}
\begin{table}[hbr]
\centering
\label{tbl:heatwheel_res}
\begin{tabular}{l*{3}{S[table-format=2.1]}}
\toprule
\textbf{Parameter} &
{\specialcellbold{Exhaust\\air}} &
{\specialcellbold{Exhaust and\\ outdoor air}} &
{\specialcellbold{Heat wheel\\(\SI{80}{\percent})}} \\
\midrule
Heat recovery [\si{\percent}] & 89,6 & 89,6 & 77,4 \\
Real heat recovery [\si{\percent}] & 50,5 & 52,1 & {---} \\
Net energy need for VH and SH & 27,7 & 27,0 & 15,8 \\
\leftspecialcell{Delivered energy for\\
\quad DHW, VH and SH} & 31,1 & 27,6 & 45,6 \\
\bottomrule
\end{tabular}
\end{table}
\end{document}
Remarks:
- Bottom aligned header row.
- Columns 2 to 4 are centered.
- Use of package
siunitx for aligning at the decimal marker and for setting the percent signs.
- The lines after the first line in a left cell is indented.
and the alignment follows the bottom line instead of vertical
centering.
- Use of em dash instead of the hyphen for the missing entry.
- Redundant percent signs removed.
- Changed the output decimal marker to the default dot (see comment of ROLF).
- A little crude is
\siunit{text-rm=\bfseries}. Option detect-weight did not work inside an S-column.
Update
I, Svend Tveskæg, found the code not very easy to read to I cleaned it up a bit (I hope it's okay):
\documentclass{report}
\usepackage{booktabs}
\usepackage{siunitx}
\sisetup{
% output-decimal-marker = {,},
detect-weight,
mode = text
}
\newcommand*{\specialcell}[2][b]{%
\begin{tabular}[#1]{@{}c@{}}#2\end{tabular}%
}
\newcommand*{\specialcellbold}[2][b]{%
\bfseries
\sisetup{text-rm = \bfseries}%
\begin{tabular}[#1]{@{}c@{}}#2\end{tabular}%
}
\newcommand*{\leftspecialcell}[2][b]{%
\begin{tabular}[#1]{@{}l@{}}#2\end{tabular}%
}
\begin{document}
\begin{table}[htbp]
\centering
\label{tbl:heatwheel-res}
\begin{tabular}{l *{3}{S[table-format = 2.1]}}
\toprule
\textbf{Parameter} &
{\specialcellbold{Exhaust \\ air}} &
{\specialcellbold{Exhaust and\\ outdoor air}} &
{\specialcellbold{Heat wheel \\ (\SI{80}{\percent})}} \\
\midrule
Heat recovery [\si{\percent}] & 89,6 & 89,6 & 77,4 \\
Real heat recovery [\si{\percent}] & 50,5 & 52,1 & {---} \\
Net energy need for VH and SH & 27,7 & 27,0 & 15,8 \\
\leftspecialcell{Delivered energy for \\
\quad DHW, VH and SH} & 31,1 & 27,6 & 45,6 \\
\bottomrule
\end{tabular}
\end{table}
\end{document}
Best Answer
Like this?
changes:
malecell(for two line headers),multirowfor multi row cells andsiunitx(for column typeS)\multicolumn{3}{l}{...}\multicolumn{8}{l}{...}Snote:
captioncontaincapt-offeatures, so there is no need to load itaddendum: In case that you like to have table over more pages, the use of
longtableis possible solution:edit: For
longtablesolution now i stole some idea (regarding first and last columns header) from Mico answer ... and add\midrulefor the\endfoot.