On Sat, Mar 15, 2008 at 04:33:32PM +0100, Christophe Genolini wrote:
> 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 <[EMAIL PROTECTED]> UNIL DGM
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
