[Tex/LaTex] Insert figure in one column

floatsmulticol

While the paper are written in two columns,I want to insert a figure into a column, which means a figure uses 0.5*paper width. At the same time, I need to use \bicaption{}{},which is in bicaption package, to create two captions for one figure.

\usepackage{caption}
\usepackage{multicol}
\usepackage{bicaption}
\begin{document}
xxxx......
\begin{multicols}{2}
\begin{figure}
\includegraphics{figure A}
\end{figure}
\end{multicols}
\end{document}

in this case, the figure can not display in a pdf document.
Note, I want to write a paper in one column at the title, and in two column at the text. The text begins at the title page. For example,
Thank you!

Best Answer

This is not possible. You cannot use a float inside a multicols environment. This means no unstarred figure or table environments. You can use the starred versions, although they will behave differently than outside multicols.

If you look at the console output or log, you will see a message explaining this, as described on page 5 of the package documentation. The behaviour of the starred versions is similarly explained in the manual.

EDIT

If you want the abstract to be two columns wide, then you can simply use the twocolumn option to the class which has no problem with floats, in conjunction with the abstract package. For example:

\documentclass[twocolumn]{article}
\usepackage{kantlipsum}
\usepackage{abstract}
\usepackage{graphicx}
\begin{document}
\twocolumn[
  \begin{onecolabstract}
    As any dedicated reader can clearly see, the Ideal
    of practical reason is a representation of, as far as I
    know, the things in themselves; as I have shown elsewhere, the phenomena should only be used as a canon
    for our understanding. The paralogisms of practical
    reason are what first give rise to the architectonic of
    practical reason. As will easily be shown in the next
    section, reason would thereby be made to contradict,
    in view of these considerations, the Ideal of practical
    reason, yet the manifold depends on the phenomena.
    Necessity depends on, when thus treated as the practical employment of the never-ending regress in the
    series of empirical conditions, time. Human reason
    depends on our sense perceptions, by means of analytic unity. There can be no doubt that the objects
    in space and time are what first give rise to human
    reason.
  \end{onecolabstract}
]
  \kant[2]
  \begin{figure}
    \includegraphics[width=\linewidth]{example-image-a}
    \caption{Example}\label{fig:a}
  \end{figure}

  \kant[3-20]

\end{document}

fancy abstract with float

The particular style of the abstract, including the indentation can then be configured using the commands provided by abstract.

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