[R] Sweave: cat() in a chunk with option results=tex doesn't producelinebreaks at the end of a character string anymore

[Duncan Murdoch]

On 05/03/2014 7:32 AM, Gerrit Eichner wrote:
> Hello, everyone,
>
> I am struggling with an Sweave-problem that didn't occur sofar (and I have
> no clue what I might have changed in my system; see below). The following
> example *.Rnw file's only task is (for simplicity) to output text with a
> little bit of TeX-code with linebreaks (e. g., to be better readable):
>
>
> \documentclass{article}
> \begin{document}
> Text 1 (not through cat()) followed by a double-backslash and
> a blank line, i.e., a linebreak.\\
>
> <<echo=FALSE, results=tex>>=
> cat( "Text 2 (through cat()) with a respected newline here\n",
>        "and likewise two tabs here\t\t followed by two double-backslashes ",
>        "and IGNORED newline escape characters at the end.\\\\ \n \n",
>        sep = "")
>
> cat( "Text 3 (through cat()) just to finish this example and ",
>        "with also IGNORED newline escapes at its end. \n \n", sep = "")
> @
> \end{document}
>
>
>
> When processed by Sweave I obtain the following TeX file:
>
>
> \documentclass{article}
> \usepackage{Sweave}
> \begin{document}
> Text 1 (not through cat()) followed by a double-backslash and
> a blank line, i.e., a linebreak.\\
>
> Text 2 (through cat()) with a respected newline here
> and likewise two tabs here		 followed by two
> double-backslashes and IGNORED newline escape characters at the end.\\
> Text 3 (through cat()) to finish this example and with also IGNORED
> newline escapes at its end. \end{document}
>
>
> the point being that the linebreaks (\n) at the ends of the output
> character strings have been completely ignored.

See the "strip.white" option in ?RweaveLatex.

Duncan Murdoch

>
> I wasn't successful in searching the archive, RSeek, SE and the like. Any
> idea where and how to continue to search, or what to do to get back
> Sweave's "old" behavior (except for reinstalling R ... which of course is
> still an option)? Thanks for any hint!
>
>    Best regards  --  Gerrit
>
> PS:
> > sessionInfo()
> R version 3.0.2 (2013-09-25)
> Platform: x86_64-w64-mingw32/x64 (64-bit)
>
> locale:
> [1] LC_COLLATE=German_Germany.1252  LC_CTYPE=German_Germany.1252
> [3] LC_MONETARY=German_Germany.1252 LC_NUMERIC=C
> [5] LC_TIME=German_Germany.1252
>
> attached base packages:
> [1] graphics  grDevices utils     datasets  stats     methods   base
>
> other attached packages:
> [1] fortunes_1.5-2
>
> loaded via a namespace (and not attached):
> [1] grid_3.0.2      lattice_0.20-27 tools_3.0.2
>
>
>
> ---------------------------------------------------------------------
> Dr. Gerrit Eichner                   Mathematical Institute, Room 212
> gerrit.eichner at math.uni-giessen.de   Justus-Liebig-University Giessen
> Tel: +49-(0)641-99-32104          Arndtstr. 2, 35392 Giessen, Germany
> Fax: +49-(0)641-99-32109        http://www.uni-giessen.de/cms/eichner
>
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