on 07/14/2008 01:39 PM Stephan Kolassa wrote:
Phil:
thanks a lot! However, my original problem[1] remains: in fact, I am
trying to \Sexpr the result for Sweave, and for some reason Sweave
regurgitates the \Sexpr command unchanged:
foo.Rnw contains:
\Sexpr{"DV~IV"}
\Sexpr{cat("DV~IV")}
\Sexpr{sub('~','$\\\\sim$',"DV~IV")}
\Sexpr{cat(sub('~','$\\\\sim$',"DV~IV"),"\n")}
After Sweave(foo) the file foo.tex then contains:
\usepackage{Sweave}
DV~IV
\Sexpr{sub('~','$\\\\sim$',"DV~IV")}
\Sexpr{cat(sub('~','$\\\\sim$',"DV~IV"),"\n")}
(yes, with the blank line resulting from \Sexpr{cat("DV~IV")}), and
LaTeX understandably complains that \Sexpr is not a valid command.
My goal: I would like to use some function bar() so that
str <- "DV~IV"
\Sexpr{bar(str)}
yields after Sweaving
DV$\sim$IV
in the tex file.
Any thoughts?
Stephan
[1] Sorry, I now see that my commented, minimal, self-contained,
reproducible code was too minimal... I reduced the problem too far. My bad!
Phil Spector schrieb:
Stephen -
Since the print function in R always displays two backslashes
for a single one, you really need to use cat or nchar to make sure
that things are working:
sub('~','$\\\\sim$',str)
[1] "ab$\\sim$cd"
cat(sub('~','$\\\\sim$',str),"\n")
ab$\sim$cd
It's the result of cat that's actually output, not the string that
R uses to display it.
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
[EMAIL PROTECTED]
On Mon, 14 Jul 2008, Stephan Kolassa wrote:
Dear guRus,
I am trying to replace "~" by "$\sim$" for TeX. However, I can't get
the backslash to work. I would like to turn "DV~IV" into "DV$\sim$IV".
sub("~","$\sim$","DV~IV") => "DV$sim$IV"
sub("~","$\\sim$","DV~IV") => "DV$sim$IV"
sub("~","$\\\sim$","DV~IV") => "DV$sim$IV"
sub("~","$\\\\sim$","DV~IV") => "DV$\\sim$IV"
Alternatives 1 and 3 also yield warnings about unknown escape
sequences (no surprise there). I have been unsuccessfully searching
the archives. sessionInfo below.
Thank you all for your time!
Best regards
Stephan
sessionInfo()
R version 2.7.1 (2008-06-23)
i386-pc-mingw32
locale:
LC_COLLATE=German_Germany.1252;LC_CTYPE=German_Germany.1252;LC_MONETARY=German_Germany.1252;LC_NUMERIC=C;LC_TIME=German_Germany.1252
attached base packages:
[1] stats graphics grDevices utils datasets tcltk
methods base
other attached packages:
[1] svIDE_0.9-5
loaded via a namespace (and not attached):
[1] svMisc_0.9-5
Stephan,
Try running Sweave on the file without SciViews loaded. There have been
some posts over the past few years, with one relatively recently,
indicating that there can be package conflicts resulting in \Sexpr{}'s
not being parsed properly. The key package in question in the past has
been R2HTML, but perhaps svIDE et al are the culprits here. The conflict
is due to an alternative or supplemental Sweave driver being loaded.
See FAQ A.18 here:
http://www.statistik.lmu.de/~leisch/Sweave/FAQ.html
It may also be that your code within the \Sexpr{} is overly complicated,
in which case, move the text processing outside the \Sexpr and then just
use the result within it:
Res <- sub('~','$\\\\sim$',"DV~IV")
\Sexpr{Res}
HTH,
Marc Schwartz
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
