[R] Creating dummys in R

Sarah Goslee sarah.goslee at gmail.com
Thu Nov 10 14:41:28 CET 2011

Without having any actual idea what you mean (sample data!), this might work:

sex <- c(1,0,1,0)
sex1 <- c(1,1,0,0)
samesex <- ifelse(sex == 1 & sex1 == 1, 1, 0)

Note that this does NOT return 1 if both initial variables are 0, so
it isn't really a samesex indicator, but it is my best guess as to
what you might want.


On Thu, Nov 10, 2011 at 5:13 AM, David . <loovet88 at 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
Sarah Goslee

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