On Dec 13, 2009, at 5:11 PM, Sean Zhang wrote:
Dear R-helpers:
Hours ago, I asked how to replace a single forward slash with a double
backward slash and recieved great help. Thanks again for all the
repliers.
In the meantime, I wonder how to replace a single backward slash
with a
double backward slash?
e.g., I want change "c:\test" into "c:\\test"
I tried the following but does not work.
gsub("\\\","\\\\",)
Can someone help?
Your problem may be that you think there actually is a "\" in "c:
\test". There isn't:
> grep("\\\\", "c:\test") # which would have found a true "\"
integer(0)
It's an escaped "t", which is the tab character = "\t":
> grep("\\\t", "c:\test")
[1] 1
> cat("rr\tqq")
rr qq
If your goal is to make file paths in Windows correctly, then you have
two choices:
a) use doubled "\\"'s in the literal strings you type, or ...
b) use "/"'s
So maybe you should explain what you are doing? We don't request that
background out of nosiness, but rather so we can give better answers
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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