Hello,
I have a question about list indexing. Lets say we have a list of 3 lists, each
containing 3 different type elements:
> a=replicate(3, list(list(c(1,1,1), diag(3), c(2,2,2))))
> a
[[1]]
[[1]][[1]]
[1] 1 1 1
[[1]][[2]]
[,1] [,2] [,3]
[1,] 1 0 0
[2,] 0 1 0
[3,] 0 0 1
[[1]][[3]]
[1] 2 2 2
[[2]]
[[2]][[1]]
[1] 1 1 1
[[2]][[2]]
[,1] [,2] [,3]
[1,] 1 0 0
[2,] 0 1 0
[3,] 0 0 1
[[2]][[3]]
[1] 2 2 2
[[3]]
[[3]][[1]]
[1] 1 1 1
[[3]][[2]]
[,1] [,2] [,3]
[1,] 1 0 0
[2,] 0 1 0
[3,] 0 0 1
[[3]][[3]]
[1] 2 2 2
If anyone can point a direction as to how to obtain (subset) the following list
from list a:
> b
[[1]]
[[1]][[1]]
[,1] [,2] [,3]
[1,] 1 0 0
[2,] 0 1 0
[3,] 0 0 1
[[1]][[2]]
[1] 2 2 2
[[2]]
[[2]][[1]]
[,1] [,2] [,3]
[1,] 1 0 0
[2,] 0 1 0
[3,] 0 0 1
[[2]][[2]]
[1] 2 2 2
Also, suppose that one wishes to assign the list "b" to the corresponding
subset of list "a". Is there a way of doing so?
Thanks for the help.
Ivo
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