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
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and provide commented, minimal, self-contained, reproducible code.
