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 [r-help-boun...@r-project.org] on behalf of Val
[valkr...@gmail.com]
Sent: April 8, 2016 10:21 PM
To: r-help@R-project.org (r-help@r-project.org)
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?
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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.
