Evenly vertically spaced lines inside makecell

Question

I have a table with a rotated header, and some makecells afterwards to fit the rotated header on one line:

\documentclass{article}
\usepackage{makecell}
\usepackage{graphicx}
\usepackage{booktabs}
\usepackage{rotating}

\renewcommand\theadfont{\normalsize}

\begin{document}
\begin{table}[t]
\centering
\begin{tabular}{cccc}
    \toprule
     & & \multicolumn{2}{c}{\textbf{Condition A}} \\
     & & A1 & A2 \\
    \cmidrule{3-4}
    \settowidth\rotheadsize{\theadfont \textbf{Condition B}}
    \rothead{\textbf{Sampling}} & \makecell{B1 \\ B2} & \makecell{xx/xx \\ xx/xx} & \makecell{xx/xx \\ xx/xx} \\
    \bottomrule
\end{tabular}
\caption{Results under different conditions}
\end{table}
\end{document}

I'd like the text in the makecells to be evenly vertically spaced in the cell, rather then centred in the middle. Is there an easy way to do this?

Answer 1

If I've well understood what you want, \rotatebox[origin=c] does the job:

\documentclass{article}
\usepackage{makecell}
\usepackage{graphicx}
\usepackage{booktabs}
\usepackage{rotating}

\renewcommand\theadfont{\normalsize}

\begin{document}

\begin{table}[t]
\centering
\renewcommand{\cellset}{\renewcommand{\arraystretch}{1.6}}
\begin{tabular}{cccc}
    \toprule
     & & \multicolumn{2}{c}{\textbf{Condition A}} \\
     & & A1 & A2 \\
    \cmidrule{3-4}
   \rotatebox[origin=c]{90}{\textbf{Sampling}} & \makecell{B1 \\ B2} & \makecell{xx/xx \\ xx/xx} & \makecell{xx/xx \\ xx/xx} \\
    \bottomrule
\end{tabular}
\caption{Results under different conditions}
\end{table}

\end{document}