I'm using TexStudio 2.8.4 to create a pdf containing knitr output and I'm running into issues with symbols showing up incorrectly either in the pdf or when copy and pasted from the pdf. Here's a minimal working example.
\documentclass{beamer}
\begin{document}
\begin{frame}[fragile]
<<>>=
#dollar$sign
if(2+2 == 4){print("math")}
@
\end{frame}
\end{document}
In my pdf output, the $ in the commented out font shows up as the pound (currency) sign, but when copy and pasted shows up correctly as a dollar sign. This does not occur when it is not commented out.
More problematically, while the braces {} appear correct in the pdf output, when copied and pasted they are f and g. This confusion does not affect R's interpretation of the braces, however.
Do you have any thoughts/suggestions for fixing this? As a work around, I'm just using a non-echoed knitr block and using a latex verbatim environment for the code on the front side, though this is not ideal.
The command I'm using in my custom build is:
"C:/Program Files/R/R-3.2.2/bin/Rscript.exe" -e "library(knitr); knit2pdf('%.Rnw')" | pdflatex -synctex=1 -interaction=nonstopmode %.tex | "C:/Program Files (x86)/Adobe/Reader 11.0/Reader/AcroRd32.exe" "?am.pdf"
Cheers!
This seems to be a problem with LaTeX encoding. The solution is adding \usepackage[T1]{fontenc} to your preamble as suggested here.