https://github.com/cran/pracma
Tip revision: 267abaa96cae63dd7872bb21b2613bd067b0a9f4 authored by Hans W. Borchers on 30 January 2018, 13:20:01 UTC
version 2.1.4
version 2.1.4
Tip revision: 267abaa
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)
}