Hi,
Is there a quick way to go from this matrix:
> A
[,1] [,2] [,3]
[1,] 1 1 1
[2,] 2 2 2
[3,] 3 3 3
[4,] 4 4 4
[5,] 5 NA 5
[6,] NA NA 6
[7,] NA NA NA
to this matrix:
> B
[,1] [,2] [,3]
[1,] 1 NA NA
[2,] 2 NA 1
[3,] 3 1 2
[4,] 4 2 3
[5,] 5 3 4
[6,] NA 4 5
[7,] NA NA 6
without using a loop?
For example using a vector which describes how many NA's are required from
the "top" of the matrix- so in this case it would be c(0,2,1).
Many thanks Emma
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