On Jan 21, 2012, at 23:04 , Sarah Goslee wrote:
> + is a metacharacter, and must be escaped:
>
>> X <- "one + two"
>> gsub("\\+", "plus", X)
> [1] "one plus two"
>
> The help for gsub() tells you to read ?regexp - that's where
> the details of regular expressions as implemented in R are
> expla
+ is a metacharacter, and must be escaped:
> X <- "one + two"
> gsub("\\+", "plus", X)
[1] "one plus two"
The help for gsub() tells you to read ?regexp - that's where
the details of regular expressions as implemented in R are
explained.
Sarah
On Sat, Jan 21, 2012 at 2:46 PM, Nevil Amos wrote:
Two ways:
i) (If you are not using full regular expressions) Set the fixed = TRUE option.
ii) Escape it.
E.g.,
gsub("\\+", "plus", X)
gsub("+", "plus", X, fixed = TRUE)
Read up on ?regexp for an explanation of what's going on.
Michael
On Sat, Jan 21, 2012 at 2:46 PM, Nevil Amos wrote:
> I a
I am trying to replace "+" in a string with another character
I am getting odd results using sub and gsub
> X<-"one + two"
> gsub("+","plus",X)
[1] "plusoplusnpluseplus plus+plus plustpluswplusoplus"
> sub("+","plus",X)
[1] "plusone + two"
> X<-"one ~ two"
it seems to work fine with other charact
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