# [R] smart way to turn a vector into a matrix

anna lippelanna24 at hotmail.com
Fri Mar 26 19:58:59 CET 2010

```Hello guys, I am working on a matrix which looks like this one:
> initialMatrix <-
> rbind(cbind(rep("A",3),seq(1,3)),cbind(rep("B",4),seq(1,4)),cbind(rep("C",3),seq(1,3)))
> initialMatrix
[,1] [,2]
[1,] "A"  "1"
[2,] "A"  "2"
[3,] "A"  "3"
[4,] "B"  "1"
[5,] "B"  "2"
[6,] "B"  "3"
[7,] "B"  "4"
[8,] "C"  "1"
[9,] "C"  "2"
[10,] "C"  "3"

and I would like to turn it into a list that looks like that but don't know
which operation to apply on it:
> myList<-list()
> myList[[1]]<-cbind(rep("A",3),seq(1,3))
> myList[[2]]<-cbind(rep("B",4),seq(1,4))
> myList[[3]]<-cbind(rep("C",3),seq(1,3))
> myList
[[1]]
[,1] [,2]
[1,] "A"  "1"
[2,] "A"  "2"
[3,] "A"  "3"

[[2]]
[,1] [,2]
[1,] "B"  "1"
[2,] "B"  "2"
[3,] "B"  "3"
[4,] "B"  "4"

[[3]]
[,1] [,2]
[1,] "C"  "1"
[2,] "C"  "2"
[3,] "C"  "3"
I thought about a using which and lapply but didn't get to a solution.
There is always a smart way to do it I'm sure but I'm not finding it...Can