Creating a table in IEEE transaction format. The last cell of the table has to combine two rows. I can put the same text using the multirow package, but the horizontal separator cuts right through the text. Here is my code for the table.
\begin{table*}
\centering
\begin{tabular}[l]{|l|l|l|l|}
\hline
\textbf{Description} & \textbf{Constraints} & \textbf{Objective} &\textbf{Remarks}\\
\hline
Sum rate maximisation with given sum power&$\sum_{i=1}^Kp_i$&$\sum_{i=1}^Kr_i$&Solved~\cite{Barman2014a}\\ \hline
Sum power minimisation with given sum rate&$\sum_{i=1}^Kr_i$&$\sum_{i=1}^Kp_i$&Proposed here\\ \hline
Weighted rate maximisation with individual power constraints&$p_i\leq p'_i\quad\forall i$&$\sum_{i=1}^Kw_ir_i$&Solved~\cite{Tse1998}\\
\hline
Sum power minimisation with individual rate constraints&$r_i\leq r'_i\quad\forall i$&$\sum_{i=1}^Kp_i$&Sub-optimal solution proposed~\cite{Yu2006}\\
\hline
Weighted sum power minimisation with individual rate constraints&$r_i\leq r'_i\quad\forall i$&$\sum_{i=1}^K\lambda_ip_i$&Not solved\\
\hline
Weighted sum power minimisation with weighted rate constraint&$\sum_{i=1}^Kw_ir_i$&$\sum_{i=1}^K\lambda_ip_i$&\multirow{2}{*}{Standard convex problem}\\
\hline
Weighted sum rate maxisation with target weighted power constraint&$\sum_{i=1}^K\lambda_ip_i$&$\sum_{i=1}^Kw_ir_i$&\\
\hline
\end{tabular}
\end{table*}
And here is my output table. 
As you can see the problem is with the "Standard convex problem". How to make the line stop at the previous column. Also please tell me how to post a large block of code here with proper tabulation. I cannot format it correctly. Sorry for the trouble.
\hlineuse\cline{1-3}for example. – Sigur Apr 25 '15 at 13:32