[R] Summing with NA
muhammad.rahiz at ouce.ox.ac.uk
Wed Mar 24 17:21:09 CET 2010
Slightly longer method, but works as well.
z <- c(-12,-9)
e <- c(-2,0)
k <- c(NA,NA)
x <- c(z,e,k)
x1 <- which(x!="NA",arr.ind=TRUE) # get elements which are not NA
x2 <- x[x1]
> Hi all,
> May I request for your help if you have time and if you have an idea on how
> to do this. I want to add three vectors... And my goal is to obtain the sum
> of the vectors, ignoring the vector of "na"...
> Here is what i did in R.. I'm adding the three vectors, e,z,k, and my
> objective is to get an answer = -23.
> I tried putting the na.omit but it did not work. Thanks.
>  -12 -9
>  -2 0
>  NA NA
>  NA
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