Revision 9e5b9bb8a0564f8bf629df4ca5e96d3078f50363 authored by jmc on 14 July 2008, 00:00:00 UTC, committed by Gabor Csardi on 14 July 2008, 00:00:00 UTC
1 parent a3b36b1
triDiag2.R
triDiag2 <- function(diagonal, upper, lower,
nrow = length(diagonal), ncol = nrow) {
value <- diag(diagonal, nrow = nrow, ncol = ncol)
n <- min(nrow, ncol-1)
if(n>0) {
rseq <- 1:n
value[cbind(rseq, rseq+1)] <- upper
}
n <- min(nrow-1, ncol)
if(n > 0) {
rseq <- 1:n
value[cbind(rseq+1, rseq)] <- lower
}
value
}
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