I have a simple knitr document:
\documentclass{article}
\begin{document}
<<>>=
`+`
@
\end{document}
which when compiled results in the error:
Error in parse(text=x, srcfile=src)
I was expecting the compiled document to show
R> `+`
function (e1, e2) .Primitive("+")
R> sessionInfo()
R version 3.0.2 (2013-09-25)
Platform: x86_64-pc-linux-gnu (64-bit)
locale:
[1] LC_CTYPE=en_GB.UTF-8 LC_NUMERIC=C LC_TIME=en_GB.UTF-8 LC_COLLATE=en_GB.UTF-8
[5] LC_MONETARY=en_GB.UTF-8 LC_MESSAGES=en_GB.UTF-8 LC_PAPER=en_GB.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C LC_MEASUREMENT=en_GB.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] tools_3.0.2
The problem is formatR
, which is used to tidy up your code before displaying and evaluating it. Your backticks get removed, leaving a bare +
, which of course won't evaluate by itself:
tidy.source(text="`+`")
# +
You can do as joran said and wrap it in print
, or you can set tidy=FALSE
:
<<tidy=FALSE>>=
`+`
@
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