[R] rbind a list of matrices

[Berend Hasselman]

On 07-03-2013, at 17:52, Heath Blackmon <coleoguy at gmail.com> wrote:

> I have a large list of matrices and a vector that identifies the desired
> matrices that I would like to rbind.  However, I am stuck on how to get
> this to work.  I have written some code below to illustrate my problem:
> 
> # 3 simple matrices
> a<-matrix(1:9,3,3)
> b<-matrix(10:18,3,3)
> c<-matrix(19:27,3,3)
> 
> #this is the type of list of matrices I am dealing with
> matrix.list<-vector("list",3)
> matrix.list[[1]]<-a
> matrix.list[[2]]<-b
> matrix.list[[3]]<-c
> 
> #i have a vector that identifies the ones that i want
> desired.matrices <- c(1,3)
> 
> #i have tried lots of things next but all fail.  This one gets close but I
> seem to lose my dim attributes
> goal<-rbind(matrix.list[desired.matrices])
> 
> Any ideas would be wonderful.


do.call(rbind,matrix.list)

Berend