vect2polyXT: Create polyX Object from Polynomial Description
In sivipm: Sensitivity Indices with Dependent Inputs

Create an object of class polyX from a dataset of transformed inputs and a vector that describes the polynomial.

1	vect2polyXT(varnames, dataXT, monomials)

`varnames`	X-input names. A character vector of length equal to the number of X-inputs.
`dataXT`	Transformed inputs. A data.frame with as many rows as observations, and as many columns as monomials.
`monomials`	Polynomial description. A character vector. Each element describes a monomial. The input variables are coded either by their numbers, or by their names. The character "*" denotes interaction between variables. See `vect2polyX` example.