Python Numpy np.lagcompanion()用法及代碼示例

np.lagcompanion()方法用於返回Laguerre級數的伴隨矩陣。

用法： np.lagcompanion(c)

參數：

c :[array_like] 1-D arrays of Laguerre series coefficients ordered from low to high.

返回：[ndarray]尺寸(度，度)的同伴矩陣。

代碼1：

# Python program explaining 
# numpy.lagcompanion() 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.lagcompanion() method  
res = geek.lagcompanion(s)  
  
# Resulting Companion matrix 
print (res)

輸出：

[[ 1.  -0.5]
 [-1.   4. ]]

代碼2：

# Python program explaining 
# numpy.lagcompanion() 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.lagcompanion() method  
res = geek.lagcompanion(s)  
  
# Resulting Companion matrix 
print (res)

輸出：

[[  1.   -1.    0.    0.8]
 [ -1.    3.   -2.    1.6]
 [  0.   -2.    5.   -0.6]
 [  0.    0.   -3.   10.2]]

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