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2004 May 27
2
block diagonal matrix function
...ake an arbitrary number of matrices as inputs? TIV Robin "blockdiag" <- function (m1, m2, p.tr = 0, p.ll = 0) { ## p.tr and p.ll are padding values topleft <- m1 topright <- matrix(p.tr, nrow(m1), ncol(m2)) colnames(topright) <- colnames(m2) lowleft <- matrix(p.ll, nrow(m2), ncol(m1)) lowright <- m2 rbind(cbind(topleft, topright), cbind(lowleft, lowright)) } m1 <- structure(c(1, 1, 3, 1, 3, 4), .Dim = as.integer(c(2, 3)), .Dimnames = list( c("a", "b"), c("x", "y", "z"))...