How to add two pictures in a single column? How to add four pictures in a single row?

Question

I am doing a paper for an ACM conference and I want to add some graphics pictures. I want to add two pictures in a single column and four pictures in single row. How is it possible?

Answer 1

There should be nothing tricky about this. You could just string them next to one another in a figure environment. Scaling to fit within the column is done using a fraction of \columnwidth:

\documentclass[twocolumn]{article}
\usepackage{graphicx,lipsum}% http://ctan.org/pkg/{graphicx,lipsum}
\begin{document}
\section{A section}
\lipsum[1]

\begin{figure}
  \centering%
    \includegraphics[width=.45\linewidth]{example-image-a}\hfill%
    \includegraphics[width=.45\linewidth]{example-image-b}%
    \caption{A figure caption}
\end{figure}

\lipsum[2-3]

\begin{figure}
  \centering%
    \includegraphics[width=.23\linewidth]{example-image-a}\hfill%
    \includegraphics[width=.23\linewidth]{example-image-b}\hfill%
    \includegraphics[width=.23\linewidth]{example-image-c}\hfill%
    \includegraphics[width=.23\linewidth]{example-image-a}\hfill%
    \caption{A figure caption}
\end{figure}

\lipsum[4-5]
\end{document}

If you wish to have the (sub)figures numbered, then a little more work is required. If you wish to have the images span multiple columns, then you could use multicol which, again, would require a little more work.

Answer 2

For 2 pictures in a column: Have the images aligned in the same place and scale them. For several pictures in a row: Just scale the pictures small enough so they fit on one line

When importing do something like

    \includegraphics[scale = 0.5]{my_pic.eps}