I have a problem in my multirow and multicolumn table. As you can see in the figure, there is an extra horizontal line over the first column. Can anybody tell me how to remove it. I constructed the entire table with the help of articles given in Latex WikiBooks.
This is my code:
\documentclass[letterpaper, 10 pt, conference]{ieeeconf}
\IEEEoverridecommandlockouts
\overrideIEEEmargins
\usepackage{multirow}
\begin{document}
\maketitle
\thispagestyle{empty}
\pagestyle{empty}
%-----------------------------------------------%
\begin{table}[!t] \label{table:accuracy}
\centering
\caption{Title.}
\begin{tabular}{| c | c | c | c | c |} \cline{1-4}
& \multicolumn{3}{ c| }{A} \\
\hline
\multicolumn{1}{|p{1cm}|}{\centering A= \\ $[B,C]$} & \multirow{2}{*}{C} & \multirow{2} {*}{D} & \multicolumn{1}{|p{1.5cm}|}{\centering E+ \\ F} & \multicolumn{1}{|p{1.8cm}|} {\centering G+\\+H+I} \\
\hline \hline
$[4,1]$ & 30.22\% & 46.67\% & 44.27\% & 30.48\% \\
$[4,2]$ & 76.94\% & 73.27\% & 80.03\% & 38.47\% \\
$[4,3]$ & 55.22\% & 68.75\% & 71.66\% & 57.29\% \\
$[4,4]$ & 98.98\% & 79.52\% & 82.59\% & 21.84\% \\
$[5,2]$ & 36.94\% & 56.48\% & 63.25\% & 47.40\% \\
$[5,3]$ & 63.99\% & 53.30\% & 51.70\% & 59.32\% \\
$[5,4]$ & 46.46\% & 39.06\% & 39.94\% & 59.91\% \\
$[6,4]$ & 96.80\% & 96.80\% & 100\% & 98.17\% \\
\hline
\multicolumn{1}{|p{1cm}|}{\centering R \\ S} & \multirow{2}{*}{56.37\%} & \multirow{2}{*}{58.33\%} & \multirow{2}{*}{\textbf{60.15\%}} & \multirow{2}{*}{\textbf{51.76\%}} \\
\hline
\end{tabular}
\end{table}
\end{document}
The top figure shows how it is currently, and how I would like it to be:
Guided filter
and other text is not shown.