Message-ID: <1336123196898-4608167.post@n4.nabble.com>
Date: 2012-05-04T09:19:56Z
From: Evgenia
Subject: Summing list with NA elements
I have a list ( in my real problem a double list y[[1:24]][[1:15]] but I
think the solution would be the same)
m <- matrix(1:3, 3, 3)
x <- list(m, m+3, m+6)
and as I want to have the sum of elements I use Reduce(`+`, x)
having as result
> Reduce(`+`, x)
[,1] [,2] [,3]
[1,] 12 12 12
[2,] 15 15 15
[3,] 18 18 18
How can I take the sum of the list elements ignoring NA element
For example if I have
x[[1]][1]<-NA
Then I want to have
[,1] [,2] [,3]
[1,] 11 12 12
[2,] 15 15 15
[3,] 18 18 18
instead of
> Reduce(`+`, x)
[,1] [,2] [,3]
[1,] NA 12 12
[2,] 15 15 15
[3,] 18 18 18
Thanks in advance
Evgenia
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