\begin{table}%t2
\caption{\label{table:fluxrolls}The initial radius and flux of the flux rolls as shown in~Fig.~\ref{fig:fat_magz}a.}
%\centering
\par
\begin{tabular}{rccc}
\hline\hline
Flux roll & $R$ ($H_p$) & $\Phi$ ($\Phi_0$) & Symbol in Fig.~\ref{fig:run_C_comparison}\\
\hline
$1$ & $0.02$ & $0.01$ &$+$\\
$2$ & $0.08$ & $0.1$  &$\diamond$\\
$3$ & $0.1$  & $0.2$  &$\triangle$\\
$4$ & $0.2$  & $0.5$  &$\Box$\\
$5$ & $0.3$  & $0.8$  &$\times$\\
\hline
\end{tabular}
\end{table}