Dear R,

Is there an efficient way to make a list that each element is from the
corresponding column of a matrix. For example, if I have a matrix "a"

> a <- matrix(1:10, 5, 2)
> a
     [,1] [,2]
[1,]    1    6
[2,]    2    7
[3,]    3    8
[4,]    4    9
[5,]    5   10

I would like to have a list "b" like this

> b <- list(a[, 1], a[, 2])
> b
[[1]]
[1] 1 2 3 4 5

[[2]]
[1]  6  7  8  9 10


Thanks in advance!


Feng

-- 
Feng Li
Department of Statistics
Stockholm University
106 91 Stockholm, Sweden
http://feng.li/

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