# Polynomials¶

Polynomials in NumPy can be *created*, *manipulated*, and even *fitted* using
the *Using the Convenience Classes*
of the `numpy.polynomial` package, introduced in NumPy 1.4.

Prior to NumPy 1.4, `numpy.poly1d` was the class of choice and it is still
available in order to maintain backward compatibility.
However, the newer Polynomial package is more complete than `numpy.poly1d`
and its convenience classes are better behaved in the numpy environment.
Therefore Polynomial is recommended for new coding.

## Transition notice¶

The various routines in the Polynomial package all deal with
series whose coefficients go from degree zero upward,
which is the *reverse order* of the Poly1d convention.
The easy way to remember this is that indexes
correspond to degree, i.e., coef[i] is the coefficient of the term of
degree i.

- Polynomial Package
- Using the Convenience Classes
- Polynomial Module (
`numpy.polynomial.polynomial`) - Chebyshev Module (
`numpy.polynomial.chebyshev`) - Legendre Module (
`numpy.polynomial.legendre`) - Laguerre Module (
`numpy.polynomial.laguerre`) - Hermite Module, “Physicists’” (
`numpy.polynomial.hermite`) - HermiteE Module, “Probabilists’” (
`numpy.polynomial.hermite_e`)