Construct Block Diagonal Matrix
Function to construct a block diagonal matrix from (a list of) matrices.
bldiag(...)
... |
individual matrices or a list of matrices. |
Posted to R-help by Berton Gunter (2 Sep 2005).
### copy data into 'dat'
dat <- dat.berkey1998
### construct list of the variance-covariance matrices of the observed outcomes for the studies
V <- lapply(split(dat[c("v1i", "v2i")], dat$trial), as.matrix)
V
### construct block diagonal matrix
V <- bldiag(V)
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