https://github.com/cran/pracma
Tip revision: 26e049d70b4a1c237987e260cba68f6a9413736c authored by Hans W. Borchers on 09 April 2019, 04:10:07 UTC
version 2.2.5
version 2.2.5
Tip revision: 26e049d
vander.R
###
### VANDER.R Vandermonde matrix
###
vander <- function(x) {
n <- length(x)
if (n == 0) return(matrix(0, nrow=0, ncol=0))
if ((!is.numeric(x) && !is.complex(x)) || is.array(x))
stop("Argument 'x' must be a numeric or complex vector.")
A <- outer(x, seq(n-1, 0), "^")
return(A)
}