polynomial(coef = c(0, 1)) as.polynomial(x) is.polynomial(x)
p
| numeric vector, giving the polynomial coefficients in increasing order. |
polynomial
constructs a polynomial from its coefficients,
i.e., p[1:k]
specifies the polynomial
p_1 + p_2 x + p_3 x^2 + ... + p_k x^{k-1}
{p[1] + p[2]* x + p[3]* x^2 + ... + p[k]* x^(k-1)}. Internally, polynomials are simply numeric coefficient vectors of class"polynomial"
.
as.polynomial
tries to coerce its arguments to a polynomial.
is.polynomial
tests whether its argument is a polynomial (in
the sense that it has class "polynomial"
.
polynomial(1:4) as.polynomial(c(1,0,3,0)) polynomial(c(2,rep(0,10),1))