Python | Numpy NP . lag root()方法
原文:https://www . geesforgeks . org/python-numpy-NP-lag root-method/
**np.lagroots()**方法用于计算一个拉盖尔级数的根。返回多项式的根。
语法:
np.lagroots(c)参数: c:【array _ like】从低到高排序的拉盖尔级数系数一维数组。返回:【ndarray】系列根的数组。如果所有的根都是真实的，那么出来也是真实的，否则就是复杂的。
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)
Output:
[ 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)
Output:
[ 0.50680523 2.37919156 5.5446037 10.76939951]
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