Re: Creating more than two level factor variables

[Sundar Dorai-Raj <sundar.dorai-raj@PDF.COM>]

Carlos Davidson wrote:

> Splus-list,
>
> I would like to create a four level factor variable from two binary 
> factor variables. So for a dataset with 1000 plus sites I have 
> information on two different categorical binary variables (fish present 
> - yes/no, and lake depth deep/shallow) and I would like to create a 
> single factor variable with the factors "fishshallow","fishdeep", 
> "nofishdeep","nofishshallow". Any suggestions of code to do this - call 
> my two binary variales fish ( values "Y" and "N") and depth (values 
> "Deep","Shallow")?
> Thank you!
>
> Carlos
How about:

fish <- ifelse(fish == "Y", "fish", "nofish")
fish.depth <- factor(paste(fish, depth, sep = ""))


--sundar