[R] "NA-friendly" operator

[Sarah Goslee]

Here's one option:
>  vec<-c(3,4,5,NA,1,NA,9,NA,1)
> subset(vec, vec > 2)
[1] 3 4 5 9
> subset(vec, vec == 1)
[1] 1 1

Sarah

On Tue, Oct 30, 2012 at 5:08 PM, vincent guyader
<vincent.guyader at gmail.com> wrote:
> Hi everyone,
>
>  i'm looking for a "NA-friendly" operator
>
> I explain :
>
>         vec<-c(3,4,5,NA,1,NA,9,NA,1)
>
>         vec[vec == 1]  # NA  1 NA NA  1
>
> I dont want the NA's :
>         vec[vec == 1 & ! is.na(vec)]# 1  1
> is the same as
>         vec[vec %in% 1] # 1  1
>
> %in% is NA-friendly :)
>
> But if i want >2 without the NA's :
>
>         vec[vec>2] #3  4  5 NA NA  9 NA
>
> if i dont want the NA i have to do :
>
>         vec[vec>2 & !is.na(vec)] #3  4  5  9
>
> is there an opérator to directly do that?
>
> any idea?
>
> thx a lot.
>


-- 
Sarah Goslee
http://www.functionaldiversity.org