gsub("\\_.*","",x)
This assume "_" if the first character following the numbers. You may need a
character class if it can be one of several.
?gsub
?regex
for further (terse for the latter) details.
Bert Gunter
Genentech Nonclinical Biostatisics
-----Original Message-----
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of stephen sefick
Sent: Friday, August 21, 2009 12:51 PM
To: r-help@r-project.org
Subject: [R] splitting a string up
x <- "1041281__2009_08_20_.lev"
I would like to split this string up and only extract the leading numbers.
1041281
to use as a label for a data column in a bigger for loop function to
read in data.
regards,
--
Stephen Sefick
Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.
-K. Mullis
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______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
