Hi,
I couldn't resist these two suggestions:
strings <- c("ASk/20005-01-45/90", "Alldatk/25-17-4567/990")
x <- as.numeric(gsub("^[^-]*-|-.*$","",strings))
or
x <- as.numeric(sub("^[^-]*-([0-9]+)-.*$","\\1",strings))
Best,
Georges
---------------------
Georges Monette, York University, Toronto
On 08/04/2016 10:53 PM, Fox, John wrote:
Dear Val,
Your question isn't entirely clear (to me), but this is what I think you want
to do:
------------------ snip ----------------
strings <- c("ASk/20005-01-45/90", "Alldatk/25-17-4567/990")
location <- regexpr("-[0-9]*", strings)
x
[1] "01" "17"
x <- substring(strings, location + 1, location + attr(location, "match.length")
- 1)
as.numeric(x)
[1] 1 17
------------------ snip ----------------
I hope this helps,
John
-----------------------------
John Fox, Professor
McMaster University
Hamilton, Ontario
Canada L8S 4M4
web: socserv.mcmaster.ca/jfox
________________________________________
From: R-help [[email protected]] on behalf of Val
[[email protected]]
Sent: April 8, 2016 10:21 PM
To: [email protected] ([email protected])
Subject: [R] assign
Hi all
I am trying t extract a variable from a column
ASk/20005-01-45/90
Alldatk/25-17-4567/990
I want to assign a variable to the numbers coming the first"-"
x=01 for the first and
x=17 for teh second
I tried using gsub but did not work
x=gsub("-")
any help?
[[alternative HTML version deleted]]
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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.
______________________________________________
[email protected] mailing list -- To UNSUBSCRIBE and more, see
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.
