在Python中使用複數點座標生成Hermite_e多項式的偽範德蒙德矩陣
要生成Hermite_e多項式的偽範德蒙德矩陣,請在Python NumPy中使用hermite_e.hermevander2d()。該方法返回偽範德蒙德矩陣。引數x,y是點座標陣列,形狀相同。資料型別將轉換為float64或complex128,具體取決於是否存在複數元素。標量將轉換為一維陣列。引數deg是最大次數列表,格式為[x_deg, y_deg]。
步驟
首先,匯入所需的庫:
import numpy as np from numpy.polynomial import hermite as H
使用numpy.array()方法建立形狀相同的點座標陣列:
x = np.array([-2.+2.j, -1.+2.j]) y = np.array([1.+2.j, 2.+2.j])
顯示陣列:
print("Array1...\n",x)
print("\nArray2...\n",y)顯示資料型別:
print("\nArray1 datatype...\n",x.dtype)
print("\nArray2 datatype...\n",y.dtype)檢查兩個陣列的維度:
print("\nDimensions of Array1...\n",x.ndim)
print("\nDimensions of Array2...\n",y.ndim)檢查兩個陣列的形狀:
print("\nShape of Array1...\n",x.shape)
print("\nShape of Array2...\n",y.shape)要生成Hermite_e多項式的偽範德蒙德矩陣,請在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]))輸出
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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