\begin{table}[ht!]
\begin{center}
\begin{tabular}{p{0.6cm}p{0.6cm}p{2.3cm}p{1.4cm}p{2.3cm}p{1.45cm}}
\hline
\bf p & \bf N & \bf $\|u-u_{h}\|_{L^{2}(0,1)}$ & \bf $L^{2}$ Rate & \bf $\|u-u_{h}\|_{H^{1}(0,1)}$ & \bf $H^{1}$ Rate\\
\hline
1 & 2 & $1.1735 \times 10^{-2}$ & \centering -- & $2.3671 \times 10^{-2}$ & \centering --\\
-- & 4 & $3.0549 \times 10^{-3}$ & 1.9416 & $1.1547 \times 10^{-2}$ & 1.0356\\
-- & 8 & $7.4722 \times 10^{-4}$ & 2.0315 & $5.4262 \times 10^{-3}$ & 1.0895\\
\hline
\end{tabular}
\end{center}
\end{table}
So I'm getting that error with the above code and I know it's because in the last column of the second row of entries (i.e. the first row with actual data), I have "centering –". I'm confused why that doesn't work though since it works for the 2nd row, 4th column entry.
Best Answer
If you need only a correction, here you are: