Python | Numpy np.legroots()方法
原文:https://www . geesforgeks . org/python-numpy-NP-leg root-method/
**np.legroots()**方法用于计算勒让德级数的根。返回多项式的根。
语法:
np.legroots(c)参数: c:【array _ like】勒让德级数系数的一维数组。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.legroots() 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.legroots() method
res = geek.legroots(s)
# Resulting legendre series coefficient
print (res)
Output:
[-0.60762522 0.27429189]
代码#2 :
# Python program explaining
# numpy.legroot() 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.legroots() method
res = geek.legroots(s)
# Resulting legendre series
print (res)
Output:
[-0.86884116 -0.48972874 0.21530729 0.68611975]
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