[R] reading matrix objects into a list

[Huntsinger, Reid]

Try 

x <- list(A)

instead. Coercion (as.list) sees A as a vector of length 90,000 (forgetting
the "dim" attribute) and assumes you want to make it a "generic vector",
which conceptually just changes its mode to "list", whereas "list"
constructs a list with entries you pass as arguments.

Reid Huntsinger

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Paul Baer
Sent: Thursday, October 13, 2005 3:41 PM
To: r-help at stat.math.ethz.ch
Subject: [R] reading matrix objects into a list


OK, I've tried to be a good citizen and use the searchable archives, 
but with three search strings I haven't found the answer to what must 
really be a simple question.

I want to create a list of objects from a set of matrices (in this 
case, 300x300). Suppose the first matrix is A. I tried:

>  x=as.list(A)

But it I get a list of length 90,000

>  length(x)
[1] 90000

instead of length 1, which is what I expected.

What's the simple trick I'm missing?

Thanks,

--Paul

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