在Python中使用2D系数数组,对x、y和z的笛卡尔积上的3D Hermite级数进行评估
要在x、y和z的笛卡尔积上评估3D Hermite级数,可以使用Python中的hermite.hermgrid3d(x, y, z, c)方法。该方法返回笛卡尔积中点的二维多项式的值。
参数是x、y和z。三维级数在笛卡尔积x、y和z的点上进行评估。如果x、y
或z是一个列表或元组,它首先被转换为ndarray;否则,如果它不是ndarray,则保持不变并且被视为标量。
参数c是一个按照i,j次的系数排序的数组,它的维度高于2时,其余的索引将枚举多个系数集合。如果c的维度少于3个,将隐式地在其形状末尾附加1,使其成为3D。结果的形状将是c.shape[3:] + x.shape + y.shape + z.shape。
步骤
首先,导入所需的库−
import numpy as np
from numpy.polynomial import hermite as H
创建一个二维系数数组 −
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)
掌握形状-
print("\nShape of our Array object...\n",c.shape)
要在x、y和z的笛卡尔乘积上评估3-D Hermite系列,在Python中使用hermite.hermgrid3d(x, y, z, c)方法−
print("\nResult...\n",H.hermgrid3d([1,2],[1,2],[1,2],c))
示例
import numpy as np
from numpy.polynomial import hermite as H
# Create a 2d 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 3-D Hermite series on the Cartesian product of x, y and z, use the hermite.hermgrid3d(x, y, z, c) method in Python
print("\nResult...\n",H.hermgrid3d([1,2],[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...
[[ 86. 154.]
[152. 272.]]