swh:1:snp:81eadaa089e8253d8469bcef66aa332632c6c669
Tip revision: 84a50252b184200bc6328ef733b7f94da0b64e4b authored by Hans W. Borchers on 29 May 2016, 21:34:12 UTC
version 1.9.3
version 1.9.3
Tip revision: 84a5025
moler.R
##
## m o l e r . R
##
moler <- function(n) {
if (length(n) != 1 || n != round(n))
stop("Argument 'n' must be an integer.")
if (n <= 0) return(c())
A <- matrix(0, nrow = n, ncol = n)
for (i in 1:n) {
A[i, 1:i] <- (1:i) - 2
}
A <- A + t(A)
diag(A) <- 1:n
A
}