Changing font size of R output in Lyx Sweave

Is there a simple way of reducing the size of the font of the R output in Lyx/Sweave? It should be simple, but I can't get anything to work. Placing\huge or \tiny in front of code chunk doesn't change the output.

My reply:

The trick is in what Sweave actually does. Sweave replaces the R code with the code and results, but as Sinput and Soutput environments, i.e.,

<<>>=
1 + 1
@

Becomes

\begin{Schunk}

\begin{Sinput}
> 1 + 1
\end{Sinput}

\begin{Soutput}
[1] 2
\end{Soutput}

\end{Schunk}

Therefore, I think you need to modify the Sinput and/or Soutput tex environments
defined in the Sweave.sty file. However, I have never done anything like that. I think there are some R packages on CRAN that did some of this things - I remember seeing green output etc.