I think you need:
thing <- vector("list", 4)
for (i in seq_along(thing)) {
thing[[i]] <- # what you want to put here
}
Best,
Dimitris
----
Dimitris Rizopoulos
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
http://www.student.kuleuven.be/~m0390867/dimitris.htm
----- Original Message -----
From: "Gonçalo Ferraz" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, March 13, 2008 2:04 PM
Subject: [R] joining matrices, vectors, scalars in one object
Hi,
I have:
a <- matrix(c(0,1,0,1),nrow=2)
b <- matrix(c(1,1,1,0,0,0),nrow=3)
c <- 1
d <- c(1,0,1)
And I would like to join them in an object 'thing' so that I can
access a, b, c, or d through an index in a for loop.
For example:
thing[4]
would return
[1] 1 0 1
Note however, that I have many of these 'thing' components. So many
that a command like
thing <- list(a = matrix(c(0,1,0,1),nrow=2), b = matrix(c
(1,1,1,0,0,0),nrow=3), c = 1, d = c(1,0,1))
would become long and awkward.
Is there a way of declaring an empty 'thing' of a given length and
then assigning its elements from a for loop? I need to allow elements
a, b, c... that can be scalars, vectors or matrices with varying
dimensions.
Thanks!
Gonçalo
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