to vertically align text in center in table when other cells are rotated

Question

I am trying to move first cell text "Assembly" to the center of cell. I already tried raisebox, parbox and many more things but nothing worked. Please help me. And, I don't want to change the rotation of other cells.

    \newcommand*\rot{\rotatebox{90}}
    \begin{table}[h!]
    \renewcommand{\arraystretch}{1.4}
    \begin{tabular}{|c|c|c|c|c|c|c|c|c|c|}
    \hline
    Assembly & \rot{Contigs} & \rot{Largest contig} & \rot{Total length} & 
    \rot{Misassemblies} & \rot{Local misassemblies} & \rot{Mismatches per 100KB} &
    \rot{N50} & \rot{Predicted genes} & \rot{Genome fraction (\%)}\\
    \hline
    \end{tabular}
    \end{table}

Answer 1

Using a multirow with a height correction works. I removed the \arraystretch=1.4 as it didn't do anything here (maybe you need it for your real table) and used \multirowcell from the makecell package, as the syntax is slightly simpler, and the package has commands to add vertical padding to cells (\gape'…}).

\documentclass[12pt]{article}
\usepackage{graphicx}
\usepackage{multirow}
\usepackage{makecell}
\newcommand*\rot[1]{\rotatebox{90}{#1}}

\begin{document}

    \begin{table}[h!]
    \begin{tabular}{|c|c|c|c|c|c|c|c|c|c|}
    \hline
    \multirowcell{1}[11ex]{Assembly}& \rot{Contigs} & \rot{Largest contig} & \rot{Total length} &
    \rot{Misassemblies} & \rot{Local misassemblies} &\gape[t]{\rot{Mismatches per 100KB}} &
    \rot{N50} & \rot{Predicted genes} & \rot{Genome fraction (\%)}\\
    \hline
    \end{tabular}
    \end{table}

\end{document}

Answer 2

Instead of \rotatebox{90} you can use \rotatebox[origin=c]{90} to rotate boxes around their centers

\documentclass[12pt]{article}
\usepackage{graphicx}


\begin{document}

\newcommand*\rot{\rotatebox[origin=c]{90}}
    \begin{table}[h!]
    \renewcommand{\arraystretch}{1.4}
    \begin{tabular}{|c|c|c|c|c|c|c|c|c|c|}
    \hline
    Assembly & \rot{Contigs} & \rot{Largest contig} & \rot{Total length} & 
    \rot{Misassemblies} & \rot{Local misassemblies} & \rot{Mismatches per 100KB} &
    \rot{N50} & \rot{Predicted genes} & \rot{Genome fraction (\%)}\\
    \hline
    \end{tabular}
    \end{table}


\end{document}