在Python中使用3D系数数组计算二维Hermite级数的值
要在点(x,y)处计算二维Hermite级数的值,可以使用Python Numpy中的hermite.hermval2d()方法。该方法返回在由x和y对应的值组成的点上,二维多项式的值。
第一个参数是x,y。二维级数在点(x,y)处进行评估,其中x和y必须具有相同的形状。如果x或y是一个列表或元组,则会首先将其转换为ndarray,否则将保持不变,如果它不是ndarray,则被视为标量。
第二个参数C是一个系数数组,按照顺序排列,使得多项式项i,j的系数包含在c[i,j]中。如果c的维度大于两个,则剩余的索引枚举多组系数。
步骤
首先,导入所需的库−
import numpy as np
from numpy.polynomial import hermite as H
创建一个系数的3D数组−
c = np.arange(24).reshape(2,2,6)
展示数组 −
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)
获得形状 −
print("\nShape of our Array object...\n",c.shape)
使用hermite.hermval2d()方法来评估二维Hermite级数在点(x, y)上的值-
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 3D array of coefficients
c = np.arange(24).reshape(2,2,6)
# 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 4 5]
[ 6 7 8 9 10 11]]
[[12 13 14 15 16 17]
[18 19 20 21 22 23]]]
Dimensions of our Array...
3
Datatype of our Array object...
int64
Shape of our Array object...
(2, 2, 6)
Result...
[[108. 360.]
[117. 385.]
[126. 410.]
[135. 435.]
[144. 460.]
[153. 485.]]