#### Previous topic

Using the Convenience Classes

#### Next topic

numpy.polynomial.polynomial.Polynomial

New in version 1.4.0.

# Power Series (numpy.polynomial.polynomial)¶

This module provides a number of objects (mostly functions) useful for dealing with polynomials, including a Polynomial class that encapsulates the usual arithmetic operations. (General information on how this module represents and works with polynomial objects is in the docstring for its “parent” sub-package, numpy.polynomial).

## Classes¶

 Polynomial(coef[, domain, window]) A power series class.

## Constants¶

 polydomain polyzero polyone polyx

## Arithmetic¶

 polyadd(c1, c2) Add one polynomial to another. polysub(c1, c2) Subtract one polynomial from another. polymulx(c) Multiply a polynomial by x. polymul(c1, c2) Multiply one polynomial by another. polydiv(c1, c2) Divide one polynomial by another. polypow(c, pow[, maxpower]) Raise a polynomial to a power. polyval(x, c[, tensor]) Evaluate a polynomial at points x. polyval2d(x, y, c) Evaluate a 2-D polynomial at points (x, y). polyval3d(x, y, z, c) Evaluate a 3-D polynomial at points (x, y, z). polygrid2d(x, y, c) Evaluate a 2-D polynomial on the Cartesian product of x and y. polygrid3d(x, y, z, c) Evaluate a 3-D polynomial on the Cartesian product of x, y and z.

## Calculus¶

 polyder(c[, m, scl, axis]) Differentiate a polynomial. polyint(c[, m, k, lbnd, scl, axis]) Integrate a polynomial.

## Misc Functions¶

 polyfromroots(roots) Generate a monic polynomial with given roots. polyroots(c) Compute the roots of a polynomial. polyvalfromroots(x, r[, tensor]) Evaluate a polynomial specified by its roots at points x. polyvander(x, deg) Vandermonde matrix of given degree. polyvander2d(x, y, deg) Pseudo-Vandermonde matrix of given degrees. polyvander3d(x, y, z, deg) Pseudo-Vandermonde matrix of given degrees. Return the companion matrix of c. polyfit(x, y, deg[, rcond, full, w]) Least-squares fit of a polynomial to data. polytrim(c[, tol]) Remove “small” “trailing” coefficients from a polynomial. polyline(off, scl) Returns an array representing a linear polynomial.