在 Python 中让一个切比雪夫级数减去另一个级数


要让一个切比雪夫级数减去另一个级数,可以使用 Python Numpy 中的 polynomial.chebyshev.chebsub() 方法。此方法返回一个切比雪夫级数系数数组,表示它们的差值。返回两个切比雪夫级数 c1 - c2 的差值。系数序列从最低次项到最高次项,即 [1,2,3] 表示级数 T_0 + 2*T_1 + 3*T_2。参数 c1 和 c2 是切比雪夫级数系数的一维数组,从低到高排列。

步骤

首先,导入所需的库 −

import numpy as np
from numpy.polynomial import chebyshev as C

创建切比雪夫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)

要让一个切比雪夫级数减去另一个级数,可以使用 Python 中的 polynomial.chebyshev.chebsub() 方法。此方法返回一个切比雪夫级数系数数组,表示它们的差 −

print("\nResult (subtraction)....\n",C.chebsub(c1,c2))

示例

import numpy as np
from numpy.polynomial import chebyshev as C

# Create 1-D arrays of Chebyshev 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 subtracr one Chebyshev series to another, use the polynomial.chebyshev.chebsub() method in Python Numpy
print("\nResult (subtraction)....\n",C.chebsub(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 (subtraction)....
[-2. 0. 2.]

更新于:28-2-2022

103 次阅读

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