在Python中从一个拉盖尔级数中减去另一个

要从一个拉盖尔级数中减去另一个，请使用Python Numpy中的polynomial.laguerre.lagsub()方法。该方法返回一个表示它们之间差异的拉盖尔级数系数数组。返回两个拉盖尔级数c1 – c2的差异。系数的顺序是从低阶项到高阶项，即[1,2,3]表示级数P_0 + 2*P_1 + 3*P_2。参数c1和c2是从低到高排序的拉盖尔级数系数的一维数组。

步骤

首先，导入所需的库−

import numpy as np
from numpy.polynomial import laguerre as L

创建拉盖尔级数系数的一维数组 −

c1 = np.array([1,2,3])
c2 = np.array([3,2,1])

显示系数的数组 –

print("Array1...\n",c1)
print("\nArray2...\n",c2)

显示数据类型 –

print("\nArray1 datatype...\n",c1.dtype)
print("\nArray2 datatype...\n",c2.dtype)

检查两个数组的维度 −

print("\nDimensions of Array1...\n",c1.ndim)
print("\nDimensions of Array2...\n",c2.ndim)

检查两个数组的形状−

print("\nShape of Array1...\n",c1.shape)
print("\nShape of Array2...\n",c2.shape)

要从一个拉盖尔级数中减去另一个级数，可以使用Python Numpy中的polynomial.laguerre.lagsub()方法。该方法返回一个表示它们差异的拉盖尔级数系数的数组 −

print("\nResult (difference)....\n",L.lagsub(c1, c2))

示例

import numpy as np
from numpy.polynomial import laguerre as L

# Create 1-D arrays of Laguerre series coefficients
c1 = np.array([1,2,3])
c2 = np.array([3,2,1])

# Display the arrays of coefficients
print("Array1...\n",c1)
print("\nArray2...\n",c2)

# Display the datatype
print("\nArray1 datatype...\n",c1.dtype)
print("\nArray2 datatype...\n",c2.dtype)

# Check the Dimensions of both the arrays
print("\nDimensions of Array1...\n",c1.ndim)
print("\nDimensions of Array2...\n",c2.ndim)

# Check the Shape of both the arrays
print("\nShape of Array1...\n",c1.shape)
print("\nShape of Array2...\n",c2.shape)

# To subtract one Laguerre series from another, use the polynomial.laguerre.lagsub() method in Python Numpy
print("\nResult (difference)....\n",L.lagsub(c1, c2))

输出

Array1...
   [1 2 3]

Array2...
   [3 2 1]

Array1 datatype...
int64

Array2 datatype...
int64

Dimensions of Array1...
1

Dimensions of Array2...
1

Shape of Array1...
(3,)

Shape of Array2...
(3,)

Result (difference)....
   [-2. 0. 2.]