# Adjust text in a table [duplicate]

I want the positions of texts in the last row (2\pi and 4\pi) to be in the middle of the row. Everything else is fine and should be kept unchanged.

\usepackage{array,bm,amsmath}
\newcolumntype{P}[1]{>{\centering\arraybackslash}p{#1}}

\begin{table}
\caption{Comparisons between the 0-$\pi$ qubit and the non-compact transmon/CPB.}
\centering
\begin{tabular}{|P{3.5cm}|P{2.2cm}|P{2.2cm}|}
\hline
& \textbf{Qubit potential periodicity}          & \textbf{Gate potential periodicity} \\ \hline
\textbf{The 0-}$\bm{\pi}$ \textbf{qubit [7,18]}                 & $\pi$ & $2\pi$   \\ \hline
\textbf{The non-compact transmon/CPB}                      &  $2\pi$  & $4\pi$   \\ \hline
\end{tabular}
\label{table:compare}
\end{table}


How can I do that?

• try m instead of p in second line above code as m{#1} – js bibra Jan 14 '20 at 5:17
• In case the answer meets your requirement please tick the check mark on the left side of the answer – js bibra Jan 14 '20 at 7:05

The m will vertically center the contents of the cell/column

\documentclass{article}

\usepackage{array}
\usepackage{booktabs}

\usepackage{array,bm,amsmath}
\newcolumntype{P}[1]{>{\centering\arraybackslash}m{#1}}

\begin{document}

\begin{table}
\caption{Comparisons between the 0-$\pi$ qubit and the non-compact transmon/CPB.}
\centering
\begin{tabular}{|P{3.5cm}|P{2.2cm}|P{2.2cm}|}
\hline
& \textbf{Qubit potential periodicity}          & \textbf{Gate potential periodicity} \\ \hline
\textbf{The 0-}$\bm{\pi}$ \textbf{qubit [7,18]}                 & $\pi$ & $2\pi$   \\ \hline
\textbf{The non-compact transmon/CPB}                      &  $2\pi$  & $4\pi$   \\ \hline
\end{tabular}
\label{table:compare}
\end{table}
\end{document}


## EDIT

\begin{table}
\caption{Comparisons between the 0-$\pi$ qubit and the non-compact transmon/CPB.}
\centering
\begin{tabular}{P{3.5cm}P{2.2cm}P{2.2cm}}
\hline
& \multicolumn{2}{c}{\textbf{Potential periodicity}}\\ \cline{2-3}
& \textbf{Qubit}          & \textbf{Gate} \\ \hline
\textbf{The 0-}$\bm{\pi}$ \textbf{qubit [7,18]} & $\pi$ & $2\pi$   \\ \hline
\textbf{The non-compact transmon/CPB}           &  $2\pi$  & $4\pi$   \\ \hline
\end{tabular}
\label{table:compare}
\end{table}
\end{document}