poly                  package:base                  R Documentation

Compute Orthogonal Polynomials

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.

Usage:

     poly(x, degree=1)

Arguments:

       x: a numeric vector at which to evaluate the polynomial

  degree: the degree of the polynomial

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)

