knitr and UTF8 encoding

Question

A few days ago, I started writing on a german R-Script. Unfortunately, the following code chunk doesn't work when I knit() the document:

@    
<<>>=
äö <- ordered(c(1,3,2,2))
@

Can anyone help me solve this problem?

PS: I'm working with Linux.

Answer 1

Since you are using Linux, things should be easy. It is probably just a LaTeX problem; most importantly, did you specify the encoding of your document? e.g. \usepackage[utf8]{inputenc}. This works for me under Ubuntu.

\documentclass[ngerman]{article}
\usepackage[utf8]{inputenc}
\begin{document}

<<>>=
äö <- ordered(c(1,3,2,2))
@

\end{document}

BTW, perhaps it is not a good idea to use non-ASCII characters in R object names, although they also work.