Resizing the whole figure

Question

Each of my article figures is in a separate .tex file (in a figure environment and has \includegraphics) and I use \input to include each in my article. The .tex files were generated automatically using the MATLAB programs I wrote.

I want to use the same .tex figures within my beamer presentation but they do not fit. How can I resize them? I tried:

\scalebox{.5}{\input{myfig.tex}}

without success.

---

This is an example myfig.tex

\begin{figure}
\centering
\begin{tabular}{c}
\includegraphics[scale=0.45]{myfig.eps}\\
Some text
\end{tabular}
\end{figure}

Answer 1

Try this version of \scalefiginput[<scale>]{<file>}:

\documentclass{article}

\usepackage{graphicx}

\usepackage{filecontents}
\begin{filecontents*}{myfig.tex}
\begin{figure}
  \centering
  \begin{tabular}{c}
    \includegraphics[scale=0.45]{example-image} \\
    Some text
  \end{tabular}
\end{figure}
\end{filecontents*}

\let\oldincludegraphics\includegraphics
\newcommand{\scalefiginput}[2][1]{%
  % Update \includegraphics to scale its argument
  \renewcommand{\includegraphics}[2][]{\scalebox{#1}{\oldincludegraphics[##1]{##2}}}%
  \input{#2}% Input figure
  % Restore \includegraphics
  \let\includegraphics\oldincludegraphics
}
\begin{document}

\input{myfig.tex}

\scalefiginput{myfig.tex}

\scalefiginput[.5]{myfig.tex}

\end{document}

The macro updates the way \includegraphics functions, changing it into a \scalebox{<scale>}{\includegraphics[..]{...}} version just for the inclusion of the <file>.

The <scale> is optional (defaulting to 1). You can also make it mandatory, if needed.

---

If you wish to scale everything (image and text), the following should do the trick:

\documentclass{article}

\usepackage{graphicx,environ}

\usepackage{filecontents}
\begin{filecontents*}{myfig.tex}
\begin{figure}
  \centering
  \begin{tabular}{c}
    \includegraphics[scale=0.45]{example-image} \\
    Some text
  \end{tabular}
\end{figure}
\end{filecontents*}

\let\oldtabular\tabular
\let\endoldtabular\endtabular
\newcommand{\scalefiginput}[2][1]{{%
  \RenewEnviron{tabular}[1]{%
    \scalebox{#1}{\begin{oldtabular}{##1}
      \BODY
    \end{oldtabular}}}%
  \input{#2}%
}}

\begin{document}

\input{myfig.tex}

\scalefiginput{myfig.tex}

\scalefiginput[.5]{myfig.tex}

\end{document}

The idea is to redefine the tabular environment so you can capture its entire contents and scale it to your liking.