R devel - Mar 2007 - Sweave bug using 'FDR' in chunk label (PR#9567)

Full_Name: Kevin Coombes
Version: 2.4.0
OS: Windows XP
Submission from: (NULL) (143.111.22.24)


I'm running R 2.4.0 on a Windows XP machine, with only the default packages
loaded.

Running Sweave or Stangle on the following Rnw file:
--------------
% bug.Rnw
\begin{document}
Demonstrate an Sweave/Stangle bug.
<<info>>sessionInfo()
@ 

<<getFDR>>x <- 1
@ 
<<getFDX>>y <- 2
@ 
<<problem>><<getFDX>>
<<getFDR>>
@ 

\end{document}
---------------

produces an error message:
> Stangle("bug.Rnw")
Writing to file bug.R 
Warning message:
reference to unknown chunk 'getFDR' in: Sweave(file = file, driver =
driver,
...) 


Here is the relevant part of the "bug.R" file produced by Stangle. 
Note that
the label has been truncated on chunk2 (should be getFDR) but is not affected on
chunk3. Also note that chunk4 has not been expanded properly.

###################################################
### chunk number 2: getF
###################################################
x <- 1

###################################################
### chunk number 3: getFDX
###################################################
y <- 2

###################################################
### chunk number 4: problem
###################################################
y <- 2

On 3/15/2007 1:58 PM, krc at mdacc.tmc.edu wrote:
> Full_Name: Kevin Coombes
> Version: 2.4.0
> OS: Windows XP
> Submission from: (NULL) (143.111.22.24)
> 
> 
> I'm running R 2.4.0 on a Windows XP machine, with only the default
packages
> loaded.
> 
> Running Sweave or Stangle on the following Rnw file:
> --------------
> % bug.Rnw
> \begin{document}
> Demonstrate an Sweave/Stangle bug.
> <<info>>> sessionInfo()
> @ 
> 
> <<getFDR>>> x <- 1
> @ 
> <<getFDX>>> y <- 2
> @ 
> <<problem>>> <<getFDX>>
> <<getFDR>>
> @ 
> 
> \end{document}
I can confirm this bug in R 2.4.1 and R-devel.  It's because of an error 
in a regular expression in  SweaveParseOptions; it is supposed to strip 
off a trailing ".R", but it doesn't escape the dot, and so it
matches
the DR in getFDR.

I'll fix it in R-devel and R-patched after testing...

Duncan Murdoch

> ---------------
> 
> produces an error message:
> 
>> Stangle("bug.Rnw")
> Writing to file bug.R 
> Warning message:
> reference to unknown chunk 'getFDR' in: Sweave(file = file, driver
= driver,
> ...) 
> 
> 
> Here is the relevant part of the "bug.R" file produced by
Stangle.  Note that
> the label has been truncated on chunk2 (should be getFDR) but is not
affected on
> chunk3. Also note that chunk4 has not been expanded properly.
> 
> ###################################################
> ### chunk number 2: getF
> ###################################################
> x <- 1
> 
> ###################################################
> ### chunk number 3: getFDX
> ###################################################
> y <- 2
> 
> ###################################################
> ### chunk number 4: problem
> ###################################################
> y <- 2
> 
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel