在 Python 中生成给定度数的伪范德蒙矩阵,并使用复数数组作为点坐标
要生成给定度数的伪范德蒙矩阵,请在 Python Numpy 中使用 polynomial.polyvander2()。此方法返回度数为 deg 和采样点 (x, y) 的伪范德蒙矩阵。参数 x 和 y 是点坐标数组,形状相同。数据类型将转换为 float64 或 complex128,具体取决于元素是否为复数。标量将转换为一维数组。参数 deg 是最大度数列表,格式为 [x_deg, y_deg]。
步骤
首先,导入所需的库 -
import numpy as np from numpy.polynomial.polynomial import polyvander2d
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)要生成给定度数的伪范德蒙矩阵,请在 Python Numpy 中使用 polynomial.polyvander2() -
x_deg, y_deg = 2, 3
print("\nResult...\n",polyvander2d(x,y, [x_deg, y_deg]))示例
import numpy as np
from numpy.polynomial.polynomial import polyvander2d
# 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 arrays
print("\nDimensions of Array1...\n",x.ndim)
print("\nDimensions of Array2...\n",y.ndim)
# Check the Shape of both the arrays
print("\nShape of Array1...\n",x.shape)
print("\nShape of Array2...\n",y.shape)
# To generate a Pseudo-Vandermonde matrix of given degree, use the polynomial.polyvander2() in Python Numpy
x_deg, y_deg = 2, 3
print("\nResult...\n",polyvander2d(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 -3. +4.j -11. -2.j -2. +2.j -6. -2.j -2.-14.j 26.-18.j 0. -8.j 16. -8.j 32.+24.j -16.+88.j] [ 1. +0.j 2. +2.j 0. +8.j -16.+16.j -1. +2.j -6. +2.j -16. -8.j -16.-48.j -3. -4.j 2.-14.j 32.-24.j 112.+16.j]]
广告
数据结构
网络
关系型数据库管理系统
操作系统
Java
iOS
HTML
CSS
Android
Python
C 语言编程
C++
C#
MongoDB
MySQL
Javascript
PHP