numpy.polyadd — NumPy v1.11 Manual (original) (raw)
numpy.polyadd(a1, a2)[source]¶
Find the sum of two polynomials.
Returns the polynomial resulting from the sum of two input polynomials. Each input must be either a poly1d object or a 1D sequence of polynomial coefficients, from highest to lowest degree.
| Parameters: | a1, a2 : array_like or poly1d object Input polynomials. |
|---|---|
| Returns: | out : ndarray or poly1d object The sum of the inputs. If either input is a poly1d object, then the output is also a poly1d object. Otherwise, it is a 1D array of polynomial coefficients from highest to lowest degree. |
Examples
np.polyadd([1, 2], [9, 5, 4]) array([9, 6, 6])
Using poly1d objects:
p1 = np.poly1d([1, 2]) p2 = np.poly1d([9, 5, 4]) print(p1) 1 x + 2 print(p2) 2 9 x + 5 x + 4 print(np.polyadd(p1, p2)) 2 9 x + 6 x + 6