Switch from two sided to one sided type

I'm trying to write a document using LaTeX using IEEEtran.cls (two sided by default). In my document, I have a portion of code, which has a big width. It would look nice to switch from the two sided mode to a one side, write the code and switch bag again. How can I do this in LaTeX?

I have tried \setboolean{@twoside}{false} but it doesn't work (no error, it just doesn't do what expected). Using \onecolumn before the code it works, but it begins with a new page.

There is any way to solve this? Btw, I'm using MiKTeX.

• Welcome to TeX.SX! Are you meaning "two column" rather than "two side"? – egreg Jun 13 '12 at 17:44
• What do you mean by "code"? An equation? Actual source code? – TriSSSe Jun 13 '12 at 17:47

You can use the figure* or table* environments (the contents will appear in the top of the next page where you write it); those environments can be used to typeset material that span both columns:

\documentclass{IEEEtran}
\usepackage{lipsum}

\begin{document}

\lipsum[2]
\begin{figure*}
\lipsum[1]
\end{figure*}
\lipsum[1-20]

\end{document}