在Python中使用复数点坐标生成Hermite_e多项式的伪范德蒙德矩阵
要生成Hermite_e多项式的伪范德蒙德矩阵,请在Python NumPy中使用hermite_e.hermevander2d()。该方法返回伪范德蒙德矩阵。参数x,y是点坐标数组,形状相同。数据类型将转换为float64或complex128,具体取决于是否存在复数元素。标量将转换为一维数组。参数deg是最大次数列表,格式为[x_deg, y_deg]。
步骤
首先,导入所需的库:
import numpy as np from numpy.polynomial import hermite as H
使用numpy.array()方法创建形状相同的点坐标数组:
x = np.array([-2.+2.j, -1.+2.j]) y = np.array([1.+2.j, 2.+2.j])
显示数组:
print("Array1...\n",x) print("\nArray2...\n",y)
显示数据类型:
print("\nArray1 datatype...\n",x.dtype) print("\nArray2 datatype...\n",y.dtype)
检查两个数组的维度:
print("\nDimensions of Array1...\n",x.ndim) print("\nDimensions of Array2...\n",y.ndim)
检查两个数组的形状:
print("\nShape of Array1...\n",x.shape) print("\nShape of Array2...\n",y.shape)
要生成Hermite_e多项式的伪范德蒙德矩阵,请在Python NumPy中使用hermite_e.hermevander2d():
x_deg, y_deg = 2, 3 print("\nResult...\n",H.hermevander2d(x,y, [x_deg, y_deg]))
示例
import numpy as np from numpy.polynomial import hermite_e as H # Create arrays of point coordinates, all of the same shape using the numpy.array() method x = np.array([-2.+2.j, -1.+2.j]) y = np.array([1.+2.j, 2.+2.j]) # Display the arrays print("Array1...\n",x) print("\nArray2...\n",y) # Display the datatype print("\nArray1 datatype...\n",x.dtype) print("\nArray2 datatype...\n",y.dtype) # Check the Dimensions of both the array print("\nDimensions of Array1...\n",x.ndim) print("\nDimensions of Array2...\n",y.ndim) # Check the Shape of both the array print("\nShape of Array1...\n",x.shape) print("\nShape of Array2...\n",y.shape) # To generate a pseudo Vandermonde matrix of the Hermite_e polynomial, use the hermite_e.hermevander2d() in Python Numpy # The method returns the pseudo-Vandermonde matrix. x_deg, y_deg = 2, 3 print("\nResult...\n",H.hermevander2d(x,y, [x_deg, y_deg]))
输出
Array1... [-2.+2.j -1.+2.j] Array2... [1.+2.j 2.+2.j] Array1 datatype... complex128 Array2 datatype... complex128 Dimensions of Array1... 1 Dimensions of Array2... 1 Shape of Array1... (2,) Shape of Array2... (2,) Result... [[ 1. +0.j 1. +2.j -4. +4.j -14. -8.j -2. +2.j -6. -2.j 0. -16.j 44. -12.j -1. -8.j 15. -10.j 36. +28.j -50.+120.j] [ 1. +0.j 2. +2.j -1. +8.j -22. +10.j -1. +2.j -6. +2.j -15. -10.j 2. -54.j -4. -4.j 0. -16.j 36. -28.j 128. +48.j]]
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