np.lagfromroots()
方法用於生成具有給定根的Laguerre級數。
用法:np.lagfromroots(roots)
參數:
roots :[array_like] Input sequence containing the roots.
返回:[ndarray] Laguerre級數的一維係數數組。
代碼1:
# Python program explaining
# numpy.lagfromroots() method
# importing numpy as np
# and numpy.polynomial.laguerre module as geek
import numpy as np
import numpy.polynomial.laguerre as geek
# Input roots
roots = (2, 4, 8)
# using np.lagfromroots() method
res = geek.lagfromroots(roots)
# Resulting laguerre series coefficient
print (res)
輸出:
[-30. -18. -10. -6.]
代碼2:
# Python program explaining
# numpy.lagfromroots() method
# importing numpy as np
# and numpy.polynomial.laguerre module as geek
import numpy as np
import numpy.polynomial.laguerre as geek
# Input roots
s = (1, 2, 3, 4, 5)
# using np.lagfromroots() method
res = geek.lagfromroots(s)
# Resulting laguerre series coefficient
print (res)
輸出:
[ -26. -64. 120. -270. 240. -120.]
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