David Winsemius wrote:
On Dec 13, 2009, at 1:00 PM, Sean Zhang wrote:
Dear R-helpers.
Can someone kindly tell me how to replace a single forward slash with
double
backward slash in a string?
i.e., from "a/b" to "a\\b"
> sub("/", "\\\\","a/b")
#the backslashes need to be doubled because they are the escape character.
[1] "a\\b"
Bzzzt. Wrong answer.
> nchar(sub("/", "\\\\","a/b") )
[1] 3
> cat(sub("/", "\\\\","a/b"),"\n")
a\b
> nchar(sub("/", "\\\\\\\\","a/b") )
[1] 4
> sub("/", "\\\\\\\\","a/b")
[1] "a\\\\b"
> cat(sub("/", "\\\\\\\\","a/b"),"\n")
a\\b
You are not the first... ;-)
--
O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B
c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalga...@biostat.ku.dk) FAX: (+45) 35327907
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