[R] assign

[Fox, John]

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-bounces at r-project.org] on behalf of Val [valkremk at gmail.com]
Sent: April 8, 2016 10:21 PM
To: r-help at R-project.org (r-help at 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?

        [[alternative HTML version deleted]]

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