empty array

Hi the list

Is it possible to create an empty matrix ? I do not mean an matrix with 
a single value that is NA (which is not empty) but a real empty one, 
with length=0.
Sure:
matrix(nrow=0, ncol=5)
[,1] [,2] [,3] [,4] [,5]
a <- array( dim=c(5,4,0) )
dim(a)
[1] 5 4 0
length(a)
[1] 0
I do not understand why we have length(numeric()), length(factor()) and 
length(character()) to zero, and length(array()) to one... Any rason for 
that ?
That i don't know, maybe someone else does.

G.
Thanks

Christophe

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Csardi Gabor <csardi at rmki.kfki.hu>    UNIL DGM

empty array

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