I need to insert some plots with one column in a two column style. How can break it. I use the IEEE journal paper style.
[Tex/LaTex] How to insert figures with two column break
floatsieeetrantwo-column
Related Solutions
From your description, it seems that the two tabular environments are being moved to a floats only page; if this is the case, the float will be placed centered vertically on the page; to change this behaviour, you can change the value for the length \@dblfptop, using
\makeatletter
\@dblfptop 0pt
\makeatother
A complete example:
\documentclass[journal]{IEEEtran}
\makeatletter
\@dblfptop 0pt
\makeatother
\title{The Title}
\author{The Author}
\markboth{Journal of \LaTeX\ Class Files,~Vol.~6, No.~1, January~2007}%
{Shell \MakeLowercase{\textit{et al.}}: Bare Demo of IEEEtran.cls for Journals}
\begin{document}
\maketitle
\begin{abstract}
The abstract goes here.
\end{abstract}
\section{Introduction}
I wish you the best of success.
\begin{table*}[!t]
\centering
\begin{tabular}{ccc}
\hline
a&b&c\\
\hline
\end{tabular}
\quad
\begin{tabular}{ccc}
\hline
d&e&f\\
\hline
\end{tabular}
\end{table*}
\end{document}
An image of the top portion of the second page, showing the float at the top:
You can use subcaption to produce sub-elements inside a float:
\documentclass[twocolumn]{article}
\usepackage{lipsum,graphicx,subcaption}
\captionsetup[subfigure]{labelformat=simple,labelsep=colon}
\renewcommand{\thesubfigure}{fig\arabic{subfigure}}
\begin{document}
\begin{figure*}[t]
\centering
\subcaptionbox{Fig1}[.3\linewidth][c]{%
\includegraphics[width=.2\linewidth]{example-image-a}}\quad
\subcaptionbox{Fig2}[.3\linewidth][c]{%
\includegraphics[width=.2\linewidth]{example-image-b}}\quad
\subcaptionbox{Fig3}[.3\linewidth][c]{%
\includegraphics[width=.2\linewidth]{example-image-c}}
\bigskip
\subcaptionbox{Fig4}[.3\linewidth][c]{%
\includegraphics[width=.2\linewidth]{example-image-c}}\quad
\subcaptionbox{Fig5}[.3\linewidth][c]{%
\includegraphics[width=.2\linewidth]{example-image-b}}\quad
\subcaptionbox{Fig6}[.3\linewidth][c]{%
\includegraphics[width=.2\linewidth]{example-image-a}}
\caption{This is a figure}
\end{figure*}
\lipsum[1-10]
\end{document}
Note that column-spanning floats in twocolumn mode will always follow the page where you put the figure* environment. If you want it on a different page, you need to adjust the placement accordingly.
Best Answer
\begin{figure*}is a figure that spans both columns.