[I originally emailed this to Friedrich Leisch but got no response and I
just wanted to make sure it made it in before release.]
While working with Stangle(), I noticed a problem when using 'split =
TRUE'. Particularly, when there are two chunks where one chunk's name
is a prefix of another chunk's name, then the two chunks will be written
to a single file rather than two separate files (if the chunk who's name
is a prefix comes after the other chunk). Running 'Stangle(split=TRUE)'
with the attached 'test1.Rnw' file should reproduce the problem.
I think it boils down to a partial matching problem in 'RtangleRuncode'.
I've attached a patch against R-alpha (r41020) which I think fixes
this problem but I'm not sure it's necessarily the best approach (there
are other instances of this construction in the code).
-roger
--
Roger D. Peng | http://www.biostat.jhsph.edu/~rpeng/
Index: src/library/utils/R/Sweave.R
===================================================================
--- src/library/utils/R/Sweave.R (revision 41020)
+++ src/library/utils/R/Sweave.R (working copy)
@@ -854,7 +854,7 @@
outfile <- paste(chunkprefix, options$engine, sep=".")
if(!object$quiet)
cat(options$chunknr, ":", outfile,"\n")
- chunkout <- object$chunkout[[chunkprefix]]
+ chunkout <- object$chunkout[chunkprefix][[1]]
if(is.null(chunkout)){
chunkout <- file(outfile, "w")
if(!is.null(options$label))
<<abcde,echo=true>>=
y <- 2
@
<<abcd,echo=true>>=
x <- 1
@
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