[R] gsub() could not replace my string

William Dunlap wdunlap at tibco.com
Fri Oct 7 22:10:45 CEST 2016

Either backslash the square brackets, as they have a special meaning
(character range) in regular expressions, or use the fixed=TRUE argument to
indicate that your pattern is not a regular expression.
> gsub("\\[NA\\]NA%", "", "[NA]NA%abcde")
[1] "abcde"
> gsub("[NA]NA%", "", "[NA]NA%abcde", fixed=TRUE)
[1] "abcde"

Your original code would replace ANA% or NNA% with a blank.
> gsub("[NA]NA%", "", c("NNA%abcde", "ANA%abcde"))
[1] "abcde" "abcde"

Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Fri, Oct 7, 2016 at 12:58 PM, Christofer Bogaso <
bogaso.christofer at gmail.com> wrote:

> Hello again,
> I have few many string elements, and some of those elements contain a
> special phrase as '"[NA]NA%", which I planned to replace by some
> Blank. So I tried with below code in R
> > gsub("[NA]NA%", "", "[NA]NA%abcde")
> [1] "[NA]NA%abcde"
> It appears that, my code could not replace "[NA]NA%" as I wanted to
> see "abcde". Can you please help me with what would be the correct
> code for doing so.
> Thanks in advance
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