  # Python | The numpy np.hermecompanion () method

NumPy | Python Methods and Functions

Using the `np.hermecompanion() ` method, we can get the companion matrix of the hermiteE row using ` np.hermecompanion () `.

Syntax: ` np.hermecompanion (series) `
Return: Return the companion matrix.

Example # 1:
In this example we see that with ` np.hermecompanion () ` we can get the companion matrix from hermiteE row using this method.

 ` # numpy and hermecompanion imports ` ` import ` ` numpy as np ` ` from ` ` numpy.polynomial .hermite_e ` ` import ` ` hermecompanion `    ` series ` ` = ` ` np.array ([` ` 6 ` `, ` ` 7 ` `, ` ` 8 ` `, ` ` 9 ` `, ` ` 10 ` `]) ` ` # using the np.hermecompanion () method `` gfg = hermecompanion (series)   print (gfg ) `

Output:

[[0. 1. 0. -0.24494897]
[1. 0. 1.41421356 -0.2857738]
[0. 1.41421356 0. 1.27017059]
[0 . 0. 1.73205081 -0.9]]

Example # 2:

 ` # numpy and hermecompanion imports ` ` import ` ` numpy as np ` ` from ` ` numpy.polynomial.hermite_e ` ` import ` ` hermecompanion `   ` series ` ` = ` ` np.array ([` ` 1 ` `, ` ` 2 ` `, ` ` 3 ` `, ` ` 4 ` `, ` ` 5 ` `]) ` ` # using the np.hermecompanion () method ` ` gfg ` ` = ` ` hermecompanion (series) `   ` print ` ` (gfg) `

Output:

[[0. 1. 0. -0.08164966]
[1. 0. 1.41421356 -0.16329932]
[0. 1.41421356 0. 1.38564065]
[0. 0. 1.73205081 -0.8]]