query about split()

["John Pitchard" <johnpitchard@googlemail.com>]

 

 

If I have the following matrix

 

> x <- matrix(1:72, ncol=6)
> x
      [,1] [,2] [,3] [,4] [,5] [,6]
 [1,]    1   13   25   37   49   61
 [2,]    2   14   26   38   50   62
 [3,]    3   15   27   39   51   63
 [4,]    4   16   28   40   52   64
 [5,]    5   17   29   41   53   65
 [6,]    6   18   30   42   54   66
 [7,]    7   19   31   43   55   67
 [8,]    8   20   32   44   56   68
 [9,]    9   21   33   45   57   69
[10,]   10   22   34   46   58   70
[11,]   11   23   35   47   59   71
[12,]   12   24   36   48   60   72
 

I would like to split it by the following matrix

> y <- matrix(1:12, ncol=6)
> y
     [,1] [,2] [,3] [,4] [,5] [,6]
[1,]    1    3    5    7    9   11
[2,]    2    4    6    8   10   12

 

so that I have a list with 6 items the first containing

 

1, 3, 5, 7, 9, 11

 

 

split(x, y) doesn't give the result that i'm looking for. Does anyone know how this is done?

 

 

Thanks in advance.

Regards,

John