[Tex/LaTex] Math symbol between two images

numberingpositioningsubfloats

I want these left-right-arrows to be higher, at center, as the red ones go, but I have no idea how it can be done.
Here's my code:

\documentclass{article}
\usepackage{geometry}
\usepackage[demo]{graphicx}
\usepackage{subfig}

\begin{document}
\begin{figure}[htb]%
\centering
\subfloat[$f(t)$]{{\includegraphics[width=5cm]{pierw1} }}%
\qquad 
\subfloat{$\Longleftrightarrow$}%
\qquad 
\subfloat[$F(\omega)$]{{\includegraphics[width=5cm]{pierw2} }}%

\subfloat[$F(t)$]{{\includegraphics[width=5cm]{pierw3} }}%
\qquad 
\subfloat{$\Longleftrightarrow$}%
\qquad 
\subfloat[$2 \pi f(-\omega)$]{{\includegraphics[width=5cm]{pierw4} }}%

\caption{2 Figures side by side}%
\label{fig:example}%
\end{figure}
\end{document}

I tried by making it as a subfloat, but I don't know how I can position it.

And second problem – how can I get rid off these (a) (b) etc. while leaving caption only?

Best Answer

Below I set the images using adjustbox's valign=c. This places the vertical anchor (used for alignment) at the centre. Since each image is set with the same (fixed) width, the "subcaptions" are set inside a similar-width \makebox:

\documentclass{article}

\usepackage[export]{adjustbox}

\begin{document}

\begin{figure}
  \centering\small

  % Top images
  \includegraphics[width=5cm, valign=c]{example-image-a}
  \qquad 
  $\Longleftrightarrow$
  \qquad 
  \includegraphics[width=5cm, valign=c]{example-image-b}

  \medskip

  % Top captions
  \makebox[5cm]{$f(t)$}
  \qquad
  \phantom{$\Longleftrightarrow$}
  \qquad
  \makebox[5cm]{$F(\omega)$}

  \bigskip

  % Bottom images
  \includegraphics[width=5cm, valign=c]{example-image-b}
  \qquad 
  $\Longleftrightarrow$
  \qquad 
  \includegraphics[width=5cm, valign=c]{example-image-a}

  \medskip

  % Bottom captions
  \makebox[5cm]{$F(t)$}
  \qquad
  \phantom{$\Longleftrightarrow$}
  \qquad
  \makebox[5cm]{$2 \pi f(-\omega)$}

  \caption{2 figures side by side}%
\end{figure}

\end{document}

Without the need for subfloat numbering, you can just set the entire structure inside a tabular:

\begin{figure}
  \centering\small

  % Top images
  \begin{tabular}{ @{} c @{\qquad} c @{\qquad} c @{} }
    \includegraphics[width=5cm,valign=c]{example-image-a} &
    $\Longleftrightarrow$ &
    \includegraphics[width=5cm,valign=c]{example-image-b} \\
    % Top captions
    \rule{0pt}{\normalbaselineskip}$f(t)$ &&
    $F(\omega)$ \\[\bigskipamount]
    % Bottom images
    \includegraphics[width=5cm, valign=c]{example-image-b} &
    $\Longleftrightarrow$ &
    \includegraphics[width=5cm, valign=c]{example-image-a} \\
    % Top captions
    \rule{0pt}{\normalbaselineskip}$F(t)$ &&
    $2 \pi f(-\omega)$
  \end{tabular}

  \caption{2 figures side by side}%
\end{figure}

Related Solutions

[Tex/LaTex] How to put two tables in a table* element so that the tables appear side by side in a two column layout scientific paper

You should use the subfig package.

\begin{table*}
\subfloat[First caption]{\begin{tabular}{...}...\end{tabular}}
\subfloat[Second caption]{\begin{tabular}{...}...\end{tabular}}
\caption{Overall caption}
\end{table*}

This can be used in conjunction with the floatrow package. See the subfig documentation for an example that aligns captions using floatrow.

EDIT:
Your example has an extra \begin{table} that doesn't belong. It also has a blank line which causes TeX to start a new paragraph which is why one table appears on top of the other.

Here's a complete example where I've also cleaned up your tables following the guidelines given in the documentation to the booktabs package.

\documentclass[twocolumn]{article}
\usepackage{subfig}
\usepackage{booktabs}
\begin{document}
\begin{table*}
\subfloat[Before processing]{
\begin{tabular}{ccccc}
\toprule
Year & Month & Country & State & Impressions\\
\midrule
2007 & JAN & IN & TN & 3\\
2007 & JAN & IN & TN & 1\\
\bottomrule 
\end{tabular}
}%
\hfill
\subfloat[After processing]{
\begin{tabular}{ccccc}
\toprule 
Year & Month & Country & State & Impressions\\
\midrule 
2007 & JAN & IN & TN & 7\\
2007 & FEB & IN & KA & 13\\
\bottomrule 
\end{tabular}
}
\caption{overall}
\end{table*}
\end{document}

[Tex/LaTex] 2×3 images spanning over a two column text

Do not leave blank lines between the subfigures. You can try something like this:

\documentclass[10pt, conference, compsocconf]{IEEEtran}
\usepackage[utf8]{inputenc}   
\usepackage{array}
\usepackage{mdwmath}
\usepackage{mdwtab}
\usepackage[caption=false,font=footnotesize]{subfig}
\usepackage[demo]{graphicx}

\begin{document}

\begin{figure*}[t]
\subfloat[A]{\label{ex0}
\includegraphics[width=0.3\textwidth]{qa}}\hfill
\subfloat[B]{\label{ex1}
\includegraphics[width=0.3\textwidth]{qb}}\hfill
\subfloat[C]{\label{ex3}
\includegraphics[width=0.3\textwidth]{qc}}\\
\subfloat[D]{\label{ex4}
\includegraphics[width=0.3\textwidth]{qd}}\hfill
\subfloat[E]{\label{ex5}
\includegraphics[width=0.3\textwidth]{qe}}\hfill
\subfloat[F]{\label{ex6}
\includegraphics[width=0.3\textwidth]{qf}}
\end{figure*}

\end{document}

I used \includegraphics form the graphicx package instead of \epsfig from the obsolete epsfig package. Instead of forcing a \quad space between the figures, you can use \hfill which will distribute the spacing evenly.

I used the demo option for the graphicx package to make my example compilable for everyone. Do not use that option in your actual code.

If you don't mind using the subcaption package (this package behaves better than subfig, See subcaption vs. subfig: Best package for referencing a subfigure), you could use something like this:

\documentclass[10pt, conference, compsocconf]{IEEEtran}
\usepackage[utf8]{inputenc}   
\usepackage{array}
\usepackage{mdwmath}
\usepackage{mdwtab}
\usepackage[font=footnotesize]{caption}
\usepackage{subcaption}
\usepackage[demo]{graphicx}

\begin{document}

\begin{figure*}[t]
\begin{subfigure}[b]{0.3\linewidth}
  \centering
  \includegraphics{qa}
  \caption{A}
  \label{ex0}
\end{subfigure}\hfill
\begin{subfigure}[b]{.3\linewidth}
  \centering
  \includegraphics{qb}
  \caption{B}
  \label{ex1}
\end{subfigure}\hfill
\begin{subfigure}[b]{.3\linewidth}
  \centering
  \includegraphics{qc}
  \caption{C}
  \label{ex2}
\end{subfigure}\\
\begin{subfigure}[b]{.3\linewidth}
  \centering
  \includegraphics{qd}
  \caption{D}
  \label{ex3}
\end{subfigure}\hfill
\begin{subfigure}[b]{.3\linewidth}
  \centering
  \includegraphics{qe}
  \caption{E}
  \label{ex4}
\end{subfigure}\hfill
\begin{subfigure}[b]{.3\linewidth}
  \centering
  \includegraphics{qf}
  \caption{F}
  \label{ex5}
\end{subfigure}
\end{figure*}

\end{document}

Best Answer

Related Solutions

[Tex/LaTex] How to put two tables in a table* element so that the tables appear side by side in a two column layout scientific paper

[Tex/LaTex] 2×3 images spanning over a two column text

Related Question