\begin{knitrout}
\definecolor{shadecolor}{rgb}{0.969, 0.969, 0.969}\color{fgcolor}\begin{kframe}
\begin{alltt}
\hlkwd{apply}\hlstd{(mu.strat.true,}\hlnum{1}\hlstd{,mean)}
\end{alltt}
\begin{verbatim}
+ [1]  4.450838  2.539182 -1.911656
\end{verbatim}
\end{kframe}
\end{knitrout}