Python Numpy np.legcompanion()用法及代码示例

np.legcompanion()方法用于返回Legendre系列的伴随矩阵。

用法： np.legcompanion(c)

参数：

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

返回：[ndarray]尺寸(度，度)的同伴矩阵。

代码1：

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

输出：

[[ 0.          0.28867513]
 [ 0.57735027 -0.33333333]]

代码2：

# Python program explaining 
# numpy.legcompanion() method  
    
# importing numpy as np   
# and numpy.polynomial.legendre module as geek  
import numpy as np  
import numpy.polynomial.legendre as geek 
    
# legendre series coefficients 
s = (1, 2, 3, 4, 5)  
  
    
# using np.legcompanion() method  
res = geek.legcompanion(s)  
  
# Resulting Companion matrix 
print (res)

输出：

[[ 0.          0.57735027  0.         -0.30237158]
 [ 0.57735027  0.          0.51639778 -0.34914862]
 [ 0.          0.51639778  0.          0.10141851]
 [ 0.          0.          0.50709255 -0.45714286]]

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注：本文由纯净天空筛选整理自jana_sayantan大神的英文原创作品 Python | Numpy np.legcompanion() method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。