[R] Converting Matrix to List

[arun]

Hi,
Try ?split()

set.seed(484)
mat1 <- cbind(rep(1:8,c(2,4,3,6,8,4,3,10)),matrix(sample(200,40*10,replace=TRUE),nrow=40))
res <- split(as.data.frame(mat1[,-1]),as.matrix(mat1[,1]))

A.K.

Hi. 

I have very large matrix of 2648 observations by 98 people in a 
study. They are covariance matrices for certain variables stacked one 
upon the other for the 98 participants, marked by a collumn indicating 
subject number. I need to convert it to a list that includes 98 sub 
covariance matrices, such that: 

[1] 

.. matrix for subject 1 .. 

[2] 

.. matrix for subject 2 .. 

etc. 

Can anyone please help me? I've searched online and I cant figure out how to do it