Code: Select all
\documentclass[final,authoryear,3p,times]{elsarticle}
\usepackage{amssymb}
\usepackage[T1]{fontenc}
\usepackage{prettyref}
\usepackage{url}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{mathtools}
\usepackage{xcolor}
\usepackage{amsfonts}
\usepackage{nicefrac}
\usepackage{capt-of}
\usepackage{float}
\usepackage{xspace}
\usepackage{verbatim}
\usepackage{mathdots}
\usepackage{bm}
\usepackage{amsmath,amssymb}
\usepackage{array}
\newcommand{\head}[1]{\textbf{#1}}
\newcolumntype{C}[1]{>{\centering\arraybackslash}p{#1}}
\usepackage{graphicx}
\usepackage{caption}
\usepackage{subcaption}
\usepackage{rotating} %table in landscape
\usepackage{color}
\usepackage{array}
\usepackage{longtable}
\usepackage{calc}
\usepackage{multirow}
\usepackage{hhline}
\usepackage{ifthen}
\usepackage{lscape}
\begin{document}
\begin{sidewaystable}
\begin{center}
\captionof{table}{\bf my Table}
\footnotesize
\begin{tabular}{|C{0.6cm}|C{2.0cm}|C{2.0cm}|C{2.0cm}|C{2.0cm}|C{2.0cm}|C{2.0cm}|C{2.0cm}|}
\hline
\textbf{Code} & \head{Number of ohh (\# [\%])} & \head{AHHH (P [\%])} & \head{Mean WAAA (lots)} & \head{Number of PLOP (\# [\%])} & \head{OHH Volume (G [\%])} & \head{Mean WAA (Y)} & \head{Fleeting Z (\%)} \\
\hline \hline
OR & X & X & X & X& X & X & X \\
\hline
SP & X & X & X & X& X & X & X \\
\hline
BF & X & X & X & X& X & X & X \\
\hline
PK & X & X & X & X& X & X & X \\
\hline
FB & X & X & X & X& X & X & X \\
\hline
CF & X & X & X & X& X & X & X \\
\hline
BS & X & X & X & X& X & X & X \\
\hline
DF & X & X & X & X& X & X & X \\
\hline
MP & X & X & X & X& X & X & X \\
\hline
PB & X & X & X & X& X & X & X \\
\hline
PS & X & X & X & X& X & X & X \\
\hline
Total & X [100.00] & X [100.00] & X & X [100.00] & X & X & X \\
\hline
\end{tabular}
\label{hi}
\end{center}
\end{sidewaystable}
\end{document}
However I now wish to split each col into two. I will use the first col as an example.
I wish the top row "Number of Ohh ()" to span two cols. Then a new row underneath that, which is 2 cells wide, with the names col A and colB.
Hence each existing col header cell is merged (in EXCEL language) and becomes the merged header for 2 new cols : col A and col B.
I have posted an attempt to show this.!

Having looked around on the web, I havent a clue how to do this. Can anyone help?
Thank you!