I'm using knitr and RStudio to compile LaTeX. In my real project I'd like to use some options from the LaTeX package 'xcolor', but when I do include \usepackage[options]xcolor
, I get the error message "Incompatible color definition on line xx" where "line xx" corresponds to knitrout blocks. I note that knitr emits \usepackage[]{color}
to the .tex file, and if I change that to xcolor, all is well. But, I have a bigger project.
Here's a minimal example .Rnw file in which I try to use a named color for url links:
\documentclass{article}
\usepackage[dvipsnames]{xcolor}
\usepackage[T1]{fontenc}
\usepackage{url}
\definecolor{Sepia}{named}{Sepia}
% hyperref setup:
\usepackage[colorlinks,pdfpagemode=UseOutlines,%
linkcolor=red,%
urlcolor=Sepia,%
plainpages=false,%
]{hyperref}
\begin{document}
<<setup, cache=FALSE, include=FALSE>>=
library(knitr)
# Global chunk options
opts_chunk$set(keep.source=TRUE, fig.align='center')
@
A quick example. I like \texttt{knitr}: \url{http://yihui.name/knitr/}.
And now for some boring input and output.
<<quickexample>>=
sessionInfo()
x <- rnorm(100, 1, 0)
mean(x)
sd(x)
sessionInfo()
@
\end{document}
I've tried using the \PassOptionsToPackage{dvipsnames}{xcolor}
workaround I've seen in other posts on xcolor, but to no avail.
Although this minimal example does give me a .pdf with sepia coloured links, but in the bigger project, the reams of incompatible color warnings makes it hard to find other LaTeX errors that I need to fix. (So I'm after cleaner log files, I guess.)
Best Answer
@Yihui's fix from the mailing list solved the problem for me:
Ps.: I've also raised an issue to that effect, as @Yihui requested.