On Nov 15, 2009, at 6:35 PM, Peng Yu wrote:
My question was from replacing a pattern by '\\'. How to replace '/'
in string by '\'?
string='abc/efg'
gsub('/','\\',string)
No, that was most definitely _not_ your posed question. If you want
now to change your question and supply a reproducible example, that's
fine, just don't claim that your mind should have been read more
properly that it was, .... please.
The problem with your _second_ question is that the printed
representation of "\" is a problem because of its special use as an
escape symbol. So sometimes it needs to be displayed as "\\". What
gets written to the screen may be different that the internal
representation. Look at the results of:
> string='abc/efg'
> cat(gsub('/','\\\\',string), file="test.txt")
You should see:
abc\efg
...although at the screen you would see:
> string='abc/efg'
> gsub('/','\\\\',string)
[1] "abc\\efg"
The first "\" escapes second "\" which in turn allows whatever follows
to be interpreted as "escaped", while the third "\" escapes the 4th
"\" so that it can be examined by the R interpreter as a real "\".
--
David.
On Sun, Nov 15, 2009 at 5:07 PM, David Winsemius <dwinsem...@comcast.net
> wrote:
?cat
cat("\\")
\
On Nov 15, 2009, at 5:30 PM, Peng Yu wrote:
I can not get the string '\'. Could somebody let me know how to
get it?
print('\')
+
+
print('\\')
[1] "\\"
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______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
