numpy.polyadd()

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:

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.

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

Links:

https://docs.scipy.org/doc/numpy-1.11.0/reference/generated/numpy.polyadd.html

doc_NumPy

2025-01-10 15:47:30

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