\begin{table} %t3
\caption{\label{t:slopes}The fitted relations between total $B_{\rm{tot}}$, 
random $B_{\rm{ran}}$, and regular $B_{\rm{reg}}$ magnetic 
field strength, and the field regularity 
${B_{{\rm reg}}}/{B_{{\rm ran}}}$, versus star-formation 
rate SFR for all regions of NGC~4254 and for different magnetic arms.
}
\small
%\centering
\par
\begin{tabular}{lllll}
\hline\hline
Regions &  $a$           & $b$             & $r$   & $N$  \\
\hline
        &\multicolumn{2}{l}{$\log B_{\rm{tot}}=a 
\log  {\rm SFR} + b$}\\
all     & $0.18\pm0.01$  & $1.56\pm0.01$   & $+0.93$ & 277\\
S arm  & $0.13\pm0.01$  & $1.50\pm0.02$   & $+0.89$ & 25\\
W arm   & $0.17\pm0.01$  & $1.59\pm0.02$   & $+0.98$ & 16\\ 
N arm   & $0.19\pm0.03$  & $1.56\pm0.05$   & $+0.72$ & 31\\ 
\hline
        &\multicolumn{2}{l}{$\log B_{\rm{ran}}=a 
\log  {\rm SFR} + b$}\\
all     & $0.26\pm0.01$  & $1.64\pm0.02$ & $0.91$ & 234\\
S arm  & $0.22\pm0.02$  & $1.57\pm0.03$ & $0.91$ & 25\\
W arm   & $0.30\pm0.03$  & $1.73\pm0.06$ & $0.95$ & 16\\ 
N arm   & $0.20\pm0.03$  & $1.55\pm0.05$ & $0.72$ & 31\\ 
\hline
        &\multicolumn{2}{l}{$\log B_{\rm{reg}}=a 
\log  {\rm SFR} + b$}\\
all     &\multicolumn{2}{c}{two-way trend}  & $0.08$ & 234\\
S arm  & $-0.28\pm0.04$  & $0.52\pm0.07$ & $-0.49$ & 25\\
W arm   & $0.17\pm0.07$  & $1.43\pm0.15$ & $0.46$ & 16\\ 
N arm   & $0.47\pm0.16$  & $1.69\pm0.05$ & $0.28$ & 31\\ 
\hline\noalign{\smallskip}
        &\multicolumn{2}{l}{$\log \frac{B_{\rm{reg}}}{B_{\rm{ran}}}=a 
\log  {\rm SFR} + b$}\\
all     & $-0.32\pm0.01$  & $-0.90\pm0.03$ & $-0.71$ & 234\\
S arm  & $-0.42\pm0.05$  & $-0.90\pm0.08$ & $-0.78$ & 25\\
W arm   & $-0.30\pm0.04$  & $-0.71\pm0.11$ & $-0.75$ & 16\\ 
N arm   & $-0.56\pm0.21$  & $-1.41\pm0.39$ & $-0.21$ & 31\\ 
\hline
\end{tabular}
\end{table}