[R] R: vector to matrix transformation
Vito Ricci
vito_ricci at yahoo.com
Fri Dec 3 11:50:15 CET 2004
Hi,
did you see:
as.data.frame()
as.matrix()
as.vector()
matrix()
> x
a b c
1 1 2 3
2 1 2 3
3 2 3 4
4 3 4 5
> is.data.frame(x)
[1] TRUE
> as.matrix(x)
a b c
1 1 2 3
2 1 2 3
3 2 3 4
4 3 4 5
> y<-as.matrix(x)
> is.matrix(y)
[1] TRUE
> as.vector(y)
[1] 1 1 2 3 2 2 3 4 3 3 4 5
> z<-as.vector(y)
> m<-matrix(z,ncol=3)
> m
[,1] [,2] [,3]
[1,] 1 2 3
[2,] 1 2 3
[3,] 2 3 4
[4,] 3 4 5
I hope I give you a little help.
Best
Vito
you wrote:
Dear,
Some analysis (linear regression) can only be
done from a vectorized dataset whereas others
require a matrix (Mantel tests). I use the two
analyses and thus need to format my data in
matrix and vector. I spent some time trying to
solve the problem and I just gave up. Did anyone
knows how to transform a matrix into a vector and
back-transform a vector into a matrix?
Thanks by advance,
GwenaÃ«l Jacob
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