hi feng,
a possible solution is
b1<-apply(a,2,list)
and possibly
lapply(b1,unlist)
if you want exactly the output equal to "list(a[, 1], a[, 2])"
best,
vito
Il 18/01/2011 13.53, Feng Li ha scritto:
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
--
====================================
Vito M.R. Muggeo
Dip.to Sc Statist e Matem `Vianelli'
Università di Palermo
viale delle Scienze, edificio 13
90128 Palermo - ITALY
tel: 091 23895240
fax: 091 485726/485612
http://dssm.unipa.it/vmuggeo
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