Revision 7ba95550c2066826c77bc78b974b7cb8cd416301 authored by Hans W. Borchers on 11 January 2017, 00:43:13 UTC, committed by cran-robot on 11 January 2017, 00:43:13 UTC
1 parent 00dcc24
wilkinson.R
##
## w i l k i n s o n . R Wilkinson matrix
##
wilkinson <- function(n){
if (length(n) != 1 || n != round(n))
stop("Argument 'n' must be an integer.")
if (n <= 0) return(c())
m <- (n-1)/2.0
r <- rep(1, n-1)
Diag(abs(-m:m)) + Diag(r, 1) + Diag(r, -1)
}
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