bundles / numpy 2.4.4 / numpy / polymul
_ArrayFunctionDispatcher
numpy:polymul
Signature
def polymul(a1, a2)Summary
Find the product of two polynomials.
Extended Summary
Finds the polynomial resulting from the multiplication of the 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 objectInput polynomials.
Returns
out: ndarray or poly1d objectThe polynomial resulting from the multiplication of the inputs. If either inputs 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
import numpy as np np.polymul([1, 2, 3], [9, 5, 1])✓
array([ 9, 23, 38, 17, 3])Using poly1d objects:
p1 = np.poly1d([1, 2, 3]) p2 = np.poly1d([9, 5, 1]) print(p1) print(p2) print(np.polymul(p1, p2))✓
4 3 2 9 x + 23 x + 38 x + 17 x + 3
See also
Aliases
numpy.polymul