[R] shQuote and cat

From: Vadim Organovich <vogranovich_at_jumptrading.com>
Date: Wed, 23 Jul 2008 11:20:24 -0500


Dear R-users,

It is my understanding that cat(shQuote(a.string)) should print the origintal a.string. Is this right? I am not sure cat() correctly prints strings which are generated by triple-shQuote():

> shQuote(shQuote("a"))

[1] "\"\\\"a\\\"\""
> cat(shQuote(shQuote(shQuote("a"))), '\n')
"\"\\"a\\"\<file://\\"a\\"\>""
As you can see the latter string has fewer quoting '\' than the former. cat() of double shQuote works as expected:

> shQuote("a")

[1] "\"a\""
> cat(shQuote(shQuote("a")), '\n')

"\"a\""
> version

               _
platform       i386-pc-mingw32
arch           i386
os             mingw32
system         i386, mingw32
status
major          2
minor          6.1
year           2007
month          11
day            26
svn rev        43537
language       R

version.string R version 2.6.1 (2007-11-26) Am I missing something?

Thanks,
Vadim



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