https://github.com/cran/pracma
Tip revision: a7001ff1805634d18a10fa371b38dbe3e48f8c9e authored by HwB on 30 October 2011, 00:00:00 UTC
version 0.8.1
version 0.8.1
Tip revision: a7001ff
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))
}