在Python中计算二维Hermite级数中的点(x, y)
要在点(x, y)处评估二维Hermite级数,在Python的Numpy中使用hermite.hermval2d()方法。该方法返回由x和y的对应值形成的点上的二维多项式的值。
第一个参数是x,y。必须使x和y具有相同的形状,以在点(x, y)上评估二维系列。如果x或y是列表或元组,则首先将其转换为ndarray,否则保持不变,如果它不是ndarray,则视为标量处理。
第二个参数C是一个按照顺序排列的系数数组,其中多项式的多重度为i,j的系数包含在c[i,j]中。如果c的维度大于二维,则其余索引枚举多组系数。
步骤
首先,导入所需的库−
import numpy as np
from numpy.polynomial import hermite as H
创建一个多维数组的系数 –
c = np.arange(4).reshape(2,2)
显示数组 –
print("Our Array...\n",c)
检查尺寸 –
print("\nDimensions of our Array...\n",c.ndim)
获取数据类型 –
print("\nDatatype of our Array object...\n",c.dtype)
获取形状-
print("\nShape of our Array object...\n",c.shape)
要在点(x, y)处评估2D Hermite系列,在Python Numpy中使用hermite.hermval2d()方法。
print("\nResult...\n",H.hermval2d([1,2],[1,2],c))
示例
import numpy as np
from numpy.polynomial import hermite as H
# Create a multidimensional array of coefficients
c = np.arange(4).reshape(2,2)
# Display the array
print("Our Array...\n",c)
# Check the Dimensions
print("\nDimensions of our Array...\n",c.ndim)
# Get the Datatype
print("\nDatatype of our Array object...\n",c.dtype)
# Get the Shape
print("\nShape of our Array object...\n",c.shape)
# To evaluate a 2D Hermite series at points (x, y), use the hermite.hermval2d() method in Python Numpy
# The method returns the values of the two dimensional polynomial at points formed with pairs of corresponding values from x and y.
print("\nResult...\n",H.hermval2d([1,2],[1,2],c))
输出
Our Array...
[[0 1]
[2 3]]
Dimensions of our Array...
2
Datatype of our Array object...
int64
Shape of our Array object...
(2, 2)
Result...
[18. 60.]