How can I caption my figure in a right way?

Question

I was writing an article and try to insert an image with a caption. So first I used the following codes,

\flashright
\includegraphics[scale=0.25]{cantor.png}

which results in

Then I wanted to add a caption below the image, so I used the following codes

\begin{figure}
\flushright
\includegraphics[scale=0.25]{cantor.png}
\caption{cantor set}
\end{figure}

which gave me,

So my question is how can I fix this large gap and make the things look like the first image with the caption underneath the image?

Answer 1

i assume you only used figure for the caption, not to float the image. The \captionof macro can be used pretty much anywhere.

The \caption or \captionof macro starts and ends with \par, so it has to go into a \parbox or minipage. Also, the caption isn't just centered; it is centered in a space \textwidth wide (like \makebox[\textwidth][c]{...}), so you need to use a minipage to reduce \textwidth (\parbox won't work)

In this case I made the minipage the same width as the image.

OTOH, if this is for an article you probably want something like wrapfig.

\documentclass{article}
\usepackage{graphicx}
\usepackage{capt-of}% or caption
\usepackage{showframe}% debugging tool, outlines text area

\newsavebox{\tempbox}

\begin{document}

\savebox{\tempbox}{\includegraphics[scale=0.25]{example-image}}
\flushright\begin{minipage}{\wd\tempbox}
\usebox{\tempbox}
\captionof{figure}{cantor set}
\end{minipage}

\end{document}