Poly1d

poly1d(c_or_r[, r, variable])

A one-dimensional polynomial class.

polyval(p, x)

Evaluate a polynomial at specific values.

poly(seq_of_zeros)

Find the coefficients of a polynomial with the given sequence of roots.

roots(p)

Return the roots of a polynomial with coefficients given in p.

polyfit(x, y, deg[, rcond, full, w, cov])

Least squares polynomial fit.

polyder(p[, m])

Return the derivative of the specified order of a polynomial.

polyint(p[, m, k])

Return an antiderivative (indefinite integral) of a polynomial.

polyadd(a1, a2)

Find the sum of two polynomials.

polydiv(u, v)

Returns the quotient and remainder of polynomial division.

polymul(a1, a2)

Find the product of two polynomials.

polysub(a1, a2)

Difference (subtraction) of two polynomials.

RankWarning

Issued by polyfit when the Vandermonde matrix is rank deficient.