Hello,
I'm not sure I understand, but if you want a ?regexp to only match
numbers before a %, try the following.
gsub("[0-9]+%", "[percentagevalue]", text1)
gsub("[0-9]+%", "[percentagevalue]", text2)
[0-9] matches any character in the range from 0 to 9, and the + means to
repeat that character any number of times. See the help page for ?regexp.
Hope this helps,
Rui Barradas
Em 04-09-2013 16:17, Simon Pickert escreveu:
Hi all,
what are the placeholders for string operations/modifications? Is there a
placeholder for numbers, which would allow me to easily replace all numbers in
a string? Something like
text1 <- c("this is a number 23%")
text2 <- c("this is not a number bla%")
newtext1 <- gsub(#%, [percentagevalue], text)
newtext2 <- gsub(#%, [percentagevalue], text)
newtext1 should be "this is a number [percentagevalue]"
newtext2 should be "this is not a number 23%"
I figured there is * ? . but I can't find a source that explains their use and
lists other placeholders..
Appreciate your help!
Thanks
Simon
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