[R] How to save row values from a matrix into one vector?

[Uwe Ligges]

On 16.09.2011 17:43, Chris82 wrote:
> Dear R users,
>
> I guess, I have a quit simple problem, but I'm not getting the solution.
>
> I create a matrix like this:
>
> test<- matrix(seq(1,3,1),ncol=5,nrow=3)
>
> then I want to create one vector, consisting of every row of the matrix.
> My first idea was to do this with a for loop.
>
>
> op<- vector()
>
> for (o in 1:3){
> op[o]<- as.vector(test.id[o,])
> }


A matrix is a vector with dim attributes, hence you can simply transpose 
and strip all the attributes:

as.vector(t(test))

Uwe Ligges

> The results should be like this:
>
> [1] 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3
>
>
> thanks!
>
>
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