[R] Large matrix into a vector

[Gabor Csardi]

A matrix is just a vector with a dim attribute, so if you remove 
the dim attribute it'll be a vector. The elements of a matrix 
are stored columnwise so you'll get just what you want, if i get
your question right.

> g <- matrix(1:6, nc=2, nr=3)
> g
     [,1] [,2]
[1,]    1    4
[2,]    2    5
[3,]    3    6
> dim(g) <- NULL
> g
[1] 1 2 3 4 5 6
> 

Gabor

On Wed, Mar 28, 2007 at 10:27:48AM -0700, A Ezhil wrote:
> Hi,
> 
> I have a matrix HR(9x27). I would like to make a
> single vector with elements: t(HR[,1]) followed by
> t(HR[,2]) and then t(HR[,3] ... etc. Is there any neat
> way of converting this matrix into a vector rather
> doing something like c(t(HR[,1]), t(HR[,2]), t(HR[,3])
> ..)?
> 
> Thanks in Advance.
> Kind regards,
> Ezhil
> 
> 
>  
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-- 
Csardi Gabor <csardi at rmki.kfki.hu>    MTA RMKI, ELTE TTK