[R] using a logical vector as a mask?

[kjetil@entelnet.bo]

On 21 Nov 2003 at 0:38, Rajarshi Guha wrote:

> v <- c(1,2,3,NA,5,6,NA,7)
> ind <- is.na(v)
> ind
[1] FALSE FALSE FALSE  TRUE FALSE FALSE  TRUE FALSE
> v[ind] <- 0
> v
[1] 1 2 3 0 5 6 0 7

Kjetil Halvorsen

> Hi,
>   say I have a vector:
> 
> v <- c(1,2,3,NA,5,6,NA,7)
> 
> And I would like to set the elements that are NA to, say, 0
> 
> I can use is.na() to get a logical vector:
> 
> ind <- is.na(v)
> 
> Is there a way in which I can use this logical vector to set the NA
> elements in v to 0?
> 
> Thanks,
> 
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