How about this (I'm showing it as a pipe because it's easier to read
that way):
library(magrittr)
"f 147/1315/587 2820/1320/587 3624/1321/587 1852/1322/587" %>%
strsplit(' ') %>%
unlist %>%
sub('^[^/]*/*','',.) %>%
sub('^[^/]*/*','',.) %>%
paste(collapse = ' ')
Georges Monette
--
Georges Monette, PhD P.Stat.(SSC) | Associate Professor. Faculty of Science,
Department of Mathematics & Statistics | North 626 Ross Building | York
University | 4700 Keele Street, Toronto, ON M3J 1P3 | Telephone: 416-736-5250 |
Fax: 416-736-5757 | E-Mail: geor...@yorku.ca
On 2017-10-09 11:02 AM, Duncan Murdoch wrote:
I have a file containing "words" like
a
a/b
a/b/c
where there may be multiple words on a line (separated by spaces).
The a, b, and c strings can contain non-space, non-slash characters.
I'd like to use gsub() to extract the c strings (which should be empty
if there are none).
A real example is
"f 147/1315/587 2820/1320/587 3624/1321/587 1852/1322/587"
which I'd like to transform to
" 587 587 587 587"
Another real example is
"f 1067 28680 24462"
which should transform to " ".
I've tried a few different regexprs, but am unable to find a way to
say "transform words by deleting everything up to and including the
2nd slash" when there might be zero, one or two slashes. Any
suggestions?
Duncan Murdoch
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______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
