poly(x, degree=1)
x
| a numeric vector at which to evaluate the polynomial |
degree
| the degree of the polynomial |
degree
over the
specified set of points x
. These are all orthogonal to the
constant polynomial of degree 0.x
and columns
corresponding to the degree, with attribute "degree"
specifying
the degrees of the columns.contr.poly
poly(1:10, 3)