Or just dim(x) <- NULL.
(as matrices in base R are just vectors with a dim attribute stored in
column major order)
ergo:
> x
[1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
> x<- 1:20 ## a vector
> is.matrix(x)
[1] FALSE
> dim(x) <- c(5,4)
> is.matrix(x)
[1] TRUE
> attributes(x)
Steve,
As Iris pointed out, some implementations of a matrix are actually of a vector
with special qualities. There are sometimes choices whether to store it a row
at a time or a column at a time.
In R, your data consisted of the integers from 1 to 20 and they clearly are
stored a column at a
You could also do
dim(x) <- c(length(x), 1)
On Sat, Aug 5, 2023, 20:12 Steven Yen wrote:
> I wish to stack columns of a matrix into one column. The following
> matrix command does it. Any other ways? Thanks.
>
> > x<-matrix(1:20,5,4)
> > x
> [,1] [,2] [,3] [,4]
> [1,]16 11 1
I wish to stack columns of a matrix into one column. The following
matrix command does it. Any other ways? Thanks.
> x<-matrix(1:20,5,4)
> x
[,1] [,2] [,3] [,4]
[1,] 1 6 11 16
[2,] 2 7 12 17
[3,] 3 8 13 18
[4,] 4 9 14 19
[5,] 5 10 15 20
> ma
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