Character vector in R as itemized list with knitr

问题

I have a vector (e.g. letters) that I want to incorporate into my .Rnw knitr document as an itemized list. How do I do this?

I have tried \Sexpr{letters} but it merely places commas between each:

a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z

Something like this is just as unhelpful:

\begin{itemize}
\item[\Sexpr{letters}]
\end{itemize}

What is the proper way to do this?

I'm looking for a result like:

• a
• b
• c
• d
• e
• f

etc.

回答1:

\documentclass{article}
\begin{document}
\begin{itemize}
  \item
<<results="asis", echo=FALSE>>=
  lets = letters[1:5]
  cat(lets, sep="\n\\item ")
@
\end{itemize}
\end{document}

Or, more elegantly, with a dummy entry instead of the explicit \item:

<<results="asis", echo=FALSE>>=
  lets = letters[1:5]
  cat("", lets, sep="\n\\item ")
@

回答2:

Or

\documentclass{article}
\begin{document}

Here is a list.

\begin{itemize}
<<results="asis", echo=FALSE>>=
cat(sprintf('\\item{%s}', letters[1:5]), sep = '\n')
@
\end{itemize}

That was a list.

\end{document}

来源：https://stackoverflow.com/questions/29656476/character-vector-in-r-as-itemized-list-with-knitr