numpy.polyder () in Python

NumPy | polyder | Python Methods and Functions

The numpy.polyder (p, m) method evaluates the derivative of a polynomial in the specified order.

Parameters:
p: [array_like or poly1D] the polynomial coefficients are given in decreasing order of powers. If the second parameter (root) is set to True then array values ​​are the roots of the polynomial equation.
For example: poly1d (3, 2, 6) = 3x 2 + 2x + 6

m: [int, optional] Order of differentiation.

Return: Derivative of polynomial.

Code: Python code explaining polyder ()

# Python code explaining
# numpy.polyder ()

 
# importing libraries

import numpy as np

import pandas as pd

 
# Plotting a polynomial

p1 = np.poly1d ([ 1 , 2 ]) 

p2 = np.poly1d ([ 4 , 9 , 5 , 4 ]) 

 

print ( "P1:" , p1) 

print ( "p2:" , p2) 

 
# Solve for x = 2

print ( "p1 at x = 2:" , p1 ( 2 )) 

print ( "p2 at x = 2:" , p2 ( 2 )) 

a = np.polyder (p1, 1 )

b = np.polyder (p2, 1 )

print ( "Using polyder" )

print ( "p1 derivative of order = 1:" , a) 

print ( "p2 derivative of order = 1:" , b) 

a = np.polyder (p1, 2 )

b = np. polyder (p2, 2 )

print ( "Using polyder" )

print ( "p1 derivative of order = 2:" , a) 

print ( "p2 derivative of order = 2:" , b)





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