On Nov 22, 2009, at 6:01 PM, Steven Kang wrote:
Hi all,
I get an error message when trying to replace *+* or *?* signs (with
empty
space) from a string.
x <- "asdf+,jkl?"
gsub("?", " ", x)
Since both ? and + are special regex characters, to do both the
substitutions at once you need to use double backslashes and an <or>
> gsub("\\?|\\+", " ", x)
[1] "asdf ,jkl "
--
David
Error message:
Error in
gsub("?", " ", x) :
invalid regular expression '?'
In addition: Warning message:
In gsub("?", " ", x) :
regcomp error: 'Invalid preceding regular expression'
Your expertise in resolving this issue would be appreciated.
Thanks.
Steven
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