Compute Orthogonal Polynomials

Usage

poly(x, degree=1)

Arguments

x a numeric vector at which to evaluate the polynomial
degree the degree of the polynomial

Description

Returns orthogonal polynomials of degree 1 to degree over the specified set of points x. These are all orthogonal to the constant polynomial of degree 0.

Value

A matrix with rows corresponding to points in x and columns corresponding to the degree, with attributes "degree" specifying the degrees of the columns and "coefs" which contains the centring and normalization constants used in constructing the orthogonal polynomials.

Note

This routine is intended for statistical purposes such as contr.poly: it does not attempt to orthogonalize to machine accuracy.

Author(s)

B.D. Ripley

See Also

contr.poly

Examples

poly(1:10, 3)

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