Hi,

Try ifelse function.

samesex <- ifelse( sex==1 & sex1==1, yes=1, no=0)

Cheers

Philippe Baril Lecavalier
On 2011-11-10 8:03 AM, "David ." <loovet88@hotmail.com> wrote:

>
> Dear R-project!
>
> How do i create 1 dummy from 2 already existing dummys. To be more
> precise, I want to create a dummy from a dummy called "sex" and another
> called "sex1" when both thoose dummys are 1 I want my created dummy
> "samesex" to take 1.
>
> Thanks for the help!
>
> Paulie
>
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