[R] How to add specific column to data.set?

[R. Michael Weylandt]

Reproducible example not provided... try this -- it should generalize
to multiple columns:

EU <- c("UK","FR","DE") # Yes, I know there are more....
countries <- data.frame( country1 = c("US","CH","UK","AU"), country2 =
c( "CA", "MX", "FR", "DE"), stringsAsFactors = FALSE)

cbind(countries, EU.Membership = Reduce(`&`, lapply(countries,
function(x) x %in% EU)))

Michael

On Tue, Apr 17, 2012 at 1:24 PM, phillip03 <phillipbrigham at hotmail.com> wrote:
> Hi Michael
>
> Sorry it is a data frame where to of the columns are 22 countries arranged
> in random. I now want to add and ekstra column that is 1 if the country par
> for the specific row is both european countries and 0 if not.
>
> Regards
>
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