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Python Numpy np.polyroots()用法及代码示例


np.polyroots()方法用于计算多项式级数的根。返回多项式的根。

用法: np.polyroots(c)
参数:
c :[array_like] 1-D arrays of polynomial series coefficients.

返回:[ndarray]系列根的数组。如果所有的根都是真实的,那么输出也是真实的,否则它是复杂的。


代码1:

# Python program explaining 
# numpy.polyroots() method  
    
# importing numpy as np   
# and numpy.polynomial.polynomial module as geek  
import numpy as np  
import numpy.polynomial.polynomial as geek 
    
# Input polynomial series coefficients 
  
s = (2, 4, 8)  
     
# using np.polyroots() method  
res = geek.polyroots(s)  
  
# Resulting polynomial series coefficient 
print (res) 
输出:
[-0.25-0.4330127j -0.25+0.4330127j]

代码2:

# Python program explaining 
# numpy.polyroot() method  
    
# importing numpy as np   
# and numpy.polynomial.polynomial module as geek  
import numpy as np  
import numpy.polynomial.polynomial as geek 
    
# polynomial series coefficients 
s = (1, 2, 3, 4, 5)  
  
    
# using np.polyroots() method  
res = geek.polyroots(s)  
  
# Resulting polynomial series 
print (res) 
输出:
[-0.53783227-0.35828469j -0.53783227+0.35828469j  0.13783227-0.67815439j
  0.13783227+0.67815439j]



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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.polyroots() 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。