numpy.polydiv

numpy.polydiv(u, v)[源代码]

Returns the quotient and remainder of polynomial division.

The input arrays are the coefficients (including any coefficients equal to zero) of the “numerator” (dividend) and “denominator” (divisor) polynomials, respectively.

Parameters:
u : array_like or poly1d

Dividend polynomial’s coefficients.

v : array_like or poly1d

Divisor polynomial’s coefficients.

Returns:
q : ndarray

Coefficients, including those equal to zero, of the quotient.

r : ndarray

Coefficients, including those equal to zero, of the remainder.

Notes

Both u and v must be 0-d or 1-d (ndim = 0 or 1), but u.ndim need not equal v.ndim. In other words, all four possible combinations - u.ndim = v.ndim = 0, u.ndim = v.ndim = 1, u.ndim = 1, v.ndim = 0, and u.ndim = 0, v.ndim = 1 - work.

Examples

\frac{3x^2 + 5x + 2}{2x + 1} = 1.5x + 1.75, remainder 0.25

>>> x = np.array([3.0, 5.0, 2.0])
>>> y = np.array([2.0, 1.0])
>>> np.polydiv(x, y)
(array([ 1.5 ,  1.75]), array([ 0.25]))