将多项式转换为 Python Legendre 级数
要将多项式转换为勒让德级数,请在 Python Numpy 中使用 legendre.poly2lag() 方法。将表示从最低次数到最高次数排序的多项式系数的数组,转换为等价勒让德级数的系数数组,从最低到最高次数排序。该方法返回一个 1 维数组,其中包含等价勒让德级数的系数。参数 pol 是一个包含多项式系数的 1 维数组
步骤
首先,导入所需的库 -
import numpy as np from numpy.polynomial import legendre as L
使用 numpy.array() 方法创建一个数组 -
c = np.array([1, 2, 3, 4, 5])
显示数组 -
print("Our Array...\n",c)
检查维度 -
print("\nDimensions of our Array...\n",c.ndim)
获取数据类型 -
print("\nDatatype of our Array object...\n",c.dtype)
获取形状 -
print("\nShape of our Array object...\n",c.shape)
要将多项式转换为勒让德级数,请在 Python Numpy 中使用 legendre.poly2lag() 方法 -
print("\nResult (polynomial to legendre)...\n",L.poly2leg(c))
示例
import numpy as np from numpy.polynomial import legendre as L # Create an array using the numpy.array() method c = np.array([1, 2, 3, 4, 5]) # Display the array print("Our Array...\n",c) # Check the Dimensions print("\nDimensions of our Array...\n",c.ndim) # Get the Datatype print("\nDatatype of our Array object...\n",c.dtype) # Get the Shape print("\nShape of our Array object...\n",c.shape) # To convert a polynomial to a Legendre series, use the legendre.poly2lag() method in Python Numpy print("\nResult (polynomial to legendre)...\n",L.poly2leg(c))
输出
Our Array... [1 2 3 4 5] Dimensions of our Array... 1 Datatype of our Array object... int64 Shape of our Array object... (5,) Result (polynomial to legendre)... [3. 4.4 4.85714286 1.6 1.14285714]
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