Hi Johannes,
Not sure if this can be done with sub() only, but combining it with
ifelse() apparently does what you want:
ifelse(nchar(a)==7, sub("^3","",a), a)
HTH,
Ivan
--
Ivan Calandra, PhD
University of Reims Champagne-Ardenne
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Le 06/10/15 16:38, Johannes Radinger a écrit :
Hi
I'd like to remove a leading "3" if my number is 7 digits long, if it is
only 6 I don't want to anything.
I think this should be possible with a 1-liner using sub() but I am not
sure how to define the number of characters following the leading one.
For example my vector:
a <- c(3593857,384723,4395843,3398374)
with sub("^3","",a) I also remove the leading from the second element which
is only 6 digits long. So how to restrict that using sub? The final result
should be
a <- c(593857,384723,4395843,398374)
Any suggestions?
Best regards,
Johannes
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