https://github.com/cran/pracma
Tip revision: c1688b374d201c13fb40b4dda2d2a89e34b94ec6 authored by Hans W. Borchers on 23 January 2021, 09:10:02 UTC
version 2.3.3
version 2.3.3
Tip revision: c1688b3
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)
}