Python | Numpy np.lagfromroots() method

np.lagfromroots() method is used to generate a Laguerre series with given roots.

Syntax : np.lagfromroots(roots)
Parameters:
roots :[array_like] Input sequence containing the roots.

Return : [ndarray] 1-D array of coefficients of Laguerre series.

Code #1 :

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python program explaining
# numpy.lagfromroots() method 
    
# importing numpy as np  
# and numpy.polynomial.laguerre module as geek 
import numpy as np 
import numpy.polynomial.laguerre as geek
    
# Input roots
  
roots = (2, 4, 8
     
# using np.lagfromroots() method 
res = geek.lagfromroots(roots) 
  
# Resulting laguerre series coefficient
print (res) 

chevron_right


Output:



[-30. -18. -10.  -6.]

 

Code #2 :

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python program explaining
# numpy.lagfromroots() method 
    
# importing numpy as np  
# and numpy.polynomial.laguerre module as geek 
import numpy as np 
import numpy.polynomial.laguerre as geek
    
# Input roots
s = (1, 2, 3, 4, 5
  
    
# using np.lagfromroots() method 
res = geek.lagfromroots(s) 
  
# Resulting laguerre series coefficient
print (res) 

chevron_right


Output:

[ -26.  -64.  120. -270.  240. -120.]

My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.