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.]
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