On May 15, 2009, at 9:46 AM, Liviu Andronic wrote:
Dear all,
I'm trying to gsub() "%" with "\%" with no obvious success.
temp1 <- c("mean", "sd", "0%", "25%", "50%", "75%", "100%")
temp1
[1] "mean" "sd" "0%" "25%" "50%" "75%" "100%"
gsub("%", "\%", temp1, fixed=TRUE)
[1] "mean" "sd" "0%" "25%" "50%" "75%" "100%"
Warning messages:
1: '\%' is an unrecognized escape in a character string
2: unrecognized escape removed from "\%"
I am not quite sure on how to deal with this error message. I tried
the following
gsub("%", "\\%", temp1, fixed=TRUE)
[1] "mean" "sd" "0\\%" "25\\%" "50\\%" "75\\%" "100\\%"
Could anyone suggest how to obtain output similar to:
[1] "mean" "sd" "0\%" "25\%" "50\%" "75\%" "100\%"
Thank you,
Liviu
Presuming that you might want to output the results to a TeX file for
subsequent processing, where the '%' would otherwise be a comment
character, the key is not to get a single '\', but a double '\\', so
that you then get a single '\' on output:
temp1 <- c("mean", "sd", "0%", "25%", "50%", "75%", "100%")
temp2 <- gsub("%", "\\\\%", temp1)
> temp2
[1] "mean" "sd" "0\\%" "25\\%" "50\\%" "75\\%" "100\\%"
> cat(temp2)
mean sd 0\% 25\% 50\% 75\% 100\%
Remember that the single '\' is an escape character, which needs to be
doubled.
HTH,
Marc Schwartz
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