[Tex/LaTex] There will be errors in table by using IET communications template document

Question

I'm trying to use IET communications template but have difficult in table design. The template can be found at

http://digital-library.theiet.org/files/IET_ResearchJournals_latex.zip

What I want is like
The code is

\documentclass[conference]{IEEEtran}
\IEEEoverridecommandlockouts
\usepackage{amsmath,amssymb,amsfonts}
\usepackage{array}
\usepackage{multirow}
\begin{table*}[!t]
\centering
\scriptsize
\caption{A Comparative Description of Different Algorithms}
\label{table3}

\begin{tabular}{|m{1.5cm}<{\centering}|m{4.5cm}<{\centering}|m{3.5cm}
<{\centering}|m{2cm}<{\centering}|m{3cm}<{\centering}|m{1cm}<{\centering}|} 
    \hline
    \textbf{1}&\textbf{2}&\textbf{3}&\textbf{4}&\textbf{5}&\textbf{6} \\ 
    \hline
    \multirow{2}{1.5cm}{\textbf{A}} & B & C  & D& E  & \cite{1-17} \\ 
    \cline{2-6} 
    & B& C  & D  & E  & \cite{1-18}  \\ 
    \cline{2-6} 
    & B  &C & D & E & \cite{1-18} \\ 
    \hline
\end{tabular}%
\end{table*}
\end{document}

But if I use the template document style/class, it will be like this:

The code is

\documentclass{cta-author}
\newtheorem{theorem}{Theorem}{}
\newtheorem{corollary}{Corollary}{}
\newtheorem{remark}{Remark}{}
\usepackage{amsmath,amssymb,amsfonts}
\usepackage{array}
\usepackage{multirow}
\begin{table*}[!t]
\centering
\scriptsize
\caption{A Comparative Description of Different Algorithms}
\label{table3}

\begin{tabular}{|m{1.5cm}<{\centering}|m{4.5cm}<{\centering}|m{3.5cm}
<{\centering}|m{2cm}<{\centering}|m{3cm}<{\centering}|m{1cm}<{\centering}|} 
    \hline
    \textbf{1}&\textbf{2}&\textbf{3}&\textbf{4}&\textbf{5}&\textbf{6} \\ 
    \hline
    \multirow{2}{1.5cm}{\textbf{A}} & B & C  & D& E  & \cite{1-17} \\ 
    \cline{2-6} 
    & B& C  & D  & E  & \cite{1-18}  \\ 
    \cline{2-6} 
    & B  &C & D & E & \cite{1-18} \\ 
    \hline
\end{tabular}%
\end{table*}
\end{document}

And errors is Extra alignment tab has been changed to \cr. … {\cite{1-21}} \ \cline{2-6}

It puzzles me for a long time. Appreciate your help.

Answer 1

It seems that cta-author class does not allow to use \cline (nor \cmidrule).

I'd suggest to you to load booktabs and use \cmidrule.

The class documentation says:

To get the table caption use the command \processtable{....}, ensure to insert a brace { before \begin{tabular} and closing brace } after \end{tabular}

hence I have modified your code accordingly.

Moreover, I think that the definition of the cell with \multirow{2}{1.5cm}{\textbf{A}} should be refined according to the actual text in it.

Finally, since your MWE is not complete, the citation are shown as ?.

\documentclass{cta-author}
\usepackage{amsmath,amssymb,amsfonts}
\usepackage{array}
\usepackage{booktabs}
\usepackage{multirow}
\newtheorem{theorem}{Theorem}{}
\newtheorem{corollary}{Corollary}{}
\newtheorem{remark}{Remark}{}

\begin{document}
    \begin{table}[!t]
        \setlength\extrarowheight{2pt}
        \processtable{A Comparative Description of Different Algorithms\label{table3}}
        {\begin{tabular}{m{1.5cm}<{\centering}m{4.5cm}<{\centering}m{3.5cm}
                    <{\centering}m{2cm}<{\centering}m{3cm}<{\centering}m{1cm}<{\centering}}
                \toprule 
                \textbf{1}&\textbf{2}&\textbf{3}&\textbf{4}&\textbf{5}&\textbf{6} \\
                \midrule
                \multirow{2}{1.5cm}{\textbf{A}} & B & C  & D& E  & \cite{1-17} \\
                \cmidrule{2-6}
                & B& C  & D  & E  & \cite{1-18} \\
                \cmidrule{2-6} 
                & B  &C & D & E & \cite{1-18} \\
                \bottomrule
        \end{tabular}}{}
    \end{table}
\end{document}