The numpy.polymul() method evaluates the product of two polynomials and returns the polynomial resulting from the multiplication of two input polynomials ‘p1’ and ‘p2’.
Syntax : numpy.polymul(p1, p2)
Parameters :
p1 : [array_like or poly1D]Input polynomial 1.
p2 : [array_like or poly1D]Input polynomial 2.Return: Polynomial resulting from multiplication of the inputs.
If either input is poly1D
object, then the output is also a poly1D object otherwise, 1D array of polynomial coefficients in decreasing order of degree.
Code : Python code explaining polymul()
# Python code explaining # numpy.polymul() # importing libraries import numpy as np
import pandas as pd
# Constructing polynomial p1 = np.poly1d([ 1 , 2 ])
p2 = np.poly1d([ 4 , 9 , 5 , 4 ])
print ( "P1 : " , p1)
print ( "\n p2 : \n" , p2)
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mul = np.polymul(p2, p1)
print ( "\n\npoly1D object : " )
print ( "Multiplication Result : \n" , mul)
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# Defining ndarray x = np.array([ 1 , 2 ])
y = np.array([ 4 , 9 , 5 , 4 ])
mul = np.polymul(y, x)
print ( "\n1D array : " )
print ( "Multiplication Result : " , mul)
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