在Python中从一个Legendre series中减去另一个

要从一个Legendre series中减去另一个，可以使用Python Numpy中的polynomial.legendre.legsub()方法。该方法返回一个表示它们之和的Legendre series的数组。

返回两个Legendre series c1-c2的差。参数是按最低阶项到最高阶项排序的系数序列，即[1,2,3]表示系列P_0+2P_1+3P_2。参数c1和c2是按低到高排列的Legendre series系数的1-D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Legendre系数的1-D数组−

c1 = np.array([2,3,4])
c2 = np.array([4,3,2])

显示系数数组−

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)

检查两个数组的维数−

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Legendre series中减去另一个，可以使用Python Numpy中的polynomial.legendre.legsub()方法−

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

示例

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

# 创建Legendre系数的1-D数组
c1 = np.array([2,3,4])
c2 = np.array([4,3,2])

# 显示系数数组
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)

# 检查两个数组的维数
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Legendre series中减去另一个，可以使用Python Numpy中的polynomial.legendre.legsub()方法
print("\nResult (difference)....\n",L.legsub(c1, c2))

输出

Array1...
   [2 3 4]

Array2...
   [4 3 2]

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.]