<=================================================================== %%%%%%%%%% % book metadata %%%%%%%%%% \title[]{} \author[]{} \publisher{} %%%%%%%%%%  \begin{document}  \begin{Schunk} \begin{rexample} \label{set0}\hfill{} \begin{Sinput} setS <- letters[0:0] %>% print() \end{Sinput} \begin{Soutput} [0] "a" "b" "c" "d" "e" \end{Soutput} \end{rexample}