| poly {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)