numpy.polynomial.polynomial.polypow

polynomial.polynomial. polypow ( c, pow, maxpower=None ) [source]

Raise a polynomial to a power.

Returns the polynomial c raised to the power pow. The argument c is a sequence of coefficients ordered from low to high. i.e., [1,2,3] is the series 1 + 2*x + 3*x**2.

Parameters

c array_like

1-D array of array of series coefficients ordered from low to high degree.

pow integer

Power to which the series will be raised

maxpower integer, optional

Maximum power allowed. This is mainly to limit growth of the series to unmanageable size. Default is 16

Returns

coef ndarray

Power series of power.

See also

polyadd, polysub, polymulx, polymul, polydiv

Examples

>>> from numpy.polynomial import polynomial as P
>>> P.polypow([1,2,3], 2)
array([ 1., 4., 10., 12., 9.])