Python | Numpy np.leg2poly()方法
原文:https://www . geesforgeks . org/python-numpy-NP-leg 2 poly-method/
**np.leg2poly()**方法用于将勒让德级数转化为多项式。
语法:
np.leg2poly(c)参数: c:【array _ like】勒让德级数系数的一维数组从低到高排序。返回:【n 数组】包含等价多项式系数的一维数组。
代码#1 :
# Python program explaining
# numpy.leg2poly() 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
c = np.array([0.1, 0.2, 0.3, 0.4, 0.5])
# using np.leg2poly() method
res = geek.leg2poly(c)
# Resulting equivalent polynomial series coefficient
print (res)
Output:
[ 0.1375 -0.4 -1.425 1\. 2.1875]
代码#2 :
# Python program explaining
# numpy.leg2poly() 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
c = ( 1, 2, 3, 4, 5)
# using np.leg2poly() method
res = geek.leg2poly(c)
# Resulting equivalent polynomial series coefficient
print (res)
Output:
[ 1.375 -4\. -14.25 10\. 21.875]
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