[R] Replacing elements of list

Ron_M ron_michael70 at yahoo.com
Mon Mar 22 09:18:13 CET 2010

Dear all,

I have following two list object, both are basically collection of matrices

dat1 <- matrix(rnorm(25*6), ncol=6)
dat1 <- split(dat1, seq(5,25,by=5))
dat1 <- lapply(dat1, matrix, ncol=6)

dat2 <- matrix(rnorm(25*4), ncol=4)
dat2 <- split(dat2, seq(5,25,by=5))
dat2 <- lapply(dat2, matrix, ncol=4)

Now I want to replace last 4 columns of each matrix at "dat1" with the
corresponding matrix in "dat2". However I want to avoid the time consuming
loop to do that. Is there any way to do that without using loop?

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