\begin{Verbatim}[commandchars=\\\{\}]
\PYG{k+kp}{set.seed}\PYG{p}{(}\PYG{l+m}{20180402}\PYG{p}{)}
x1 \PYG{o}{\PYGZlt{}\PYGZhy{}} rnorm\PYG{p}{(}\PYG{l+m}{100}\PYG{p}{,} \PYG{l+m}{0}\PYG{p}{,} \PYG{l+m}{1}\PYG{p}{)}
x2 \PYG{o}{\PYGZlt{}\PYGZhy{}} rnorm\PYG{p}{(}\PYG{l+m}{100}\PYG{p}{,} \PYG{l+m}{0.5}\PYG{p}{,} \PYG{l+m}{1}\PYG{p}{)}
hist\PYG{p}{(}x1\PYG{p}{,} col\PYG{o}{=}\PYG{l+s}{\PYGZdq{}red\PYGZdq{}}\PYG{p}{)}
hist\PYG{p}{(}x2\PYG{p}{,} col\PYG{o}{=}\PYG{l+s}{\PYGZdq{}blue\PYGZdq{}}\PYG{p}{,} add\PYG{o}{=}\PYG{k+kc}{TRUE}\PYG{p}{)}
\end{Verbatim}