Python| Numpy np.lagroots() 方法

np.lagroots()方法用于计算拉盖尔级数的根。返回多项式的根。

Syntax : np.lagroots(c)
Parameters:
c :[array_like] 1-D arrays of Laguerre series coefficients ordered from low to high.

Return : [ndarray] Array of the roots of the series. If all the roots are real, then out is also real, otherwise it is complex.

代码#1：

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

输出：

[ 0.8416876  4.1583124]

代码#2：

# Python program explaining
# numpy.lagroot() method 
    
# importing numpy as np  
# and numpy.polynomial.laguerre module as geek 
import numpy as np 
import numpy.polynomial.laguerre as geek
    
# Laguerre series coefficients
s = (1, 2, 3, 4, 5) 
  
    
# using np.lagroots() method 
res = geek.lagroots(s) 
  
# Resulting laguerre series
print (res) 

输出：

[  0.50680523   2.37919156   5.5446037   10.76939951]