Re: [R] Odp: NA-values and logical operation

Hi Patrick Hausmann napsal dne 13.01.2009 18:18:38: > Hi Petr, > > works perfect, thanks a lot! > > Perhaps you can take a look at this 'problem'? I want to get a > new vector for which (x == 2 & y == 2 & z == 2) = TRUE > (the real dataframe has 21 columns to check) > > o <- data.frame(x=c(

[R] Odp: NA-values and logical operation

Hi r-help-boun...@r-project.org napsal dne 13.01.2009 11:58:45: > Dear list, > > as a result of a logical operation I want to assign > a new variable to a DF with NA-values. > > z <- data.frame( x = c(5,6,5,NA,7,5,4,NA), > y = c(1,2,2,2,2,2,2,2) ) > > p <- (z$x <= 5) & (z$y