poly.wrap: Orthogonal Polynomial Wrapper
In quantreg.nonpar: Nonparametric Series Quantile Regression

A wrapper for poly, dpoly, and ddpoly.

1	poly.wrap(x, degree = 1, coefs = NULL, nderivs = 1, raw = FALSE)

`x`	a numeric vector at which to evaluate the polynomial. `x` can also be a matrix. Missing values are not allowed in `x`.
`degree`	the degree of the polynomial. Must be less than the number of unique points if `raw = TRUE`.
`coefs`	for prediction, coefficients from a previous fit.
`nderivs`	allowable values are 0, 1, and 2. If `nderivs = 0`, all other arguments are passed to `poly`. If `nderivs = 1`, all other arguments are passed to `dpoly`. If `nderivs = 2`, all other arguments are passed to `ddpoly`.
`raw`	if true, use raw and not orthogonal polynomials.