vandermonde()
generates Vandermonde matrices, the hyperSpec
method
generates a hyperSpec
object containing the van der Monde matrix of the
wavelengths of a hyperSpec
object.
vanderMonde(x, order, ...) # S4 method for hyperSpec vanderMonde(x, order, ..., normalize.wl = normalize01)
x | object to evaluate the polynomial on |
---|---|
order | of the polynomial |
... | hyperSpec method: further arguments to |
normalize.wl | function to transorm the wavelengths before evaluating the polynomial (or
other function). |
Vandermonde matrix
hyperSpec method: hyperSpec object containing van der Monde matrix as spectra and an additional column `$.vdm.order$ giving the order of each spectrum (term).
It is often numerically preferrable to map wl(x)
to [0, 1], see the
example.
wl.eval()
for calculating arbitrary functions of the wavelength,
normalize01()
C. Beleites