Inline code format with knitr and .Rnw

Question

I use knitr to weave my .Rnw documents into .tex and then .pdf document (still using pdflatex).

I'm looking for a solution to have the exact same format for inline code and for code chunks. I can use the texttt{} function to get the same font, but I am looking for a way to get the exact same format (font, background color, syntax highlighting).

Somebody has an idea?

Answer 1

I found the following approximate solution:

\documentclass{article}
\usepackage{helvet}
\renewcommand{\familydefault}{\sfdefault}
\usepackage{sansmath}
\begin{document}
<<>>=
options(digits = 3, scipen = 6)
some_small_number <- 0.000000000123456
@

  Default math font: \Sexpr{some_small_number}
  Sans-serif font: {\sansmath \Sexpr{some_small_number}}
\end{document}

Output:

I would prefer it matches to Helvetica, but at least is it somewhat similar.

UPDATE: Loading sansmath after setting default font, \sfdefault, does make the math font match the current default (code and image above is corrected for this).