[R] New factor from two olds factors

[Uwe Ligges]

Jorge Magalhães wrote:
> 
> Hi,
> 
> Suppose i have two factors:
> 
> factor1<-Structure(factor(c(1,3,2,1,2,1,2,1,3),levels=1:3),
> .Label=c("Yes","No","NY")))

For sure you mean 
 factor1 <- structure(factor(c(1,3,2,1,2,1,2,1,3), levels=1:3),
Label=c("Yes","No","NY"))


> factor2<-Structure(factor(c(2,1,2,1,3,2,2,1,3),levels=1:3),
> .Label=c("Yes","No", "NY")))
> 
> i want define a new factor from the factors 1 and 2. For that i tried:
> 
> >array3<- is.numeric(factor1)+is.numeric(factor2)

But using as.numeric(), I guess.


> array3=(3,4,4,2,5,3,4,2,6)
> 
> Now i need to define two new classes: if 2,3 and 4 ----->> class1 else class2
> 
> What is the best way for making that?
> 
> Thanks in the advance.
> 
> Jorge M.


For example: 
 factor(ifelse(array3 < 5, 1, 2))

Uwe Ligges