https://github.com/cran/pracma
Tip revision: e4641665e964c87f969d6efbb037ce5df2f85813 authored by Hans W. Borchers on 16 October 2018, 19:00:04 UTC
version 2.1.8
version 2.1.8
Tip revision: e464166
eye.R
##
## e y e . R Generate basic Matrices
##
eye <- function(n, m = n) {
stopifnot(is.numeric(n), length(n) == 1,
is.numeric(m), length(m) == 1)
n <- floor(n)
m <- floor(m)
if (n <= 0 || m <= 0) return(matrix(NA, 0, 0))
else return(base::diag(1, n, m))
}
ones <- function(n, m = n) {
stopifnot(is.numeric(n), length(n) == 1,
is.numeric(m), length(m) == 1)
n <- floor(n)
m <- floor(m)
if (n <= 0 || m <= 0) return(matrix(1, 0, 0))
else return(matrix(1, n, m))
}
zeros <- function(n, m = n) {
stopifnot(is.numeric(n), length(n) == 1,
is.numeric(m), length(m) == 1)
n <- floor(n)
m <- floor(m)
if (n <= 0 || m <= 0) return(matrix(0, 0, 0))
else return(matrix(0, n, m))
}