\begin{Schunk}
\begin{Sinput}
 reslt2 <- grep("_chronrun\\.", cnames, value = TRUE)
 reslt2
\end{Sinput}
\begin{Soutput}
[1] "ar_chronrun.n" "ar_chronrun.l" "ar_chronrun.s"
\end{Soutput}
\end{Schunk}
