在Python中删除Hermite多项式的小尾系数
要从Hermite多项式中删除小尾系数,请使用Python的Numpy库中的hermite.hermtrim()方法。该方法返回一个去除尾部零的一维数组。如果结果序列为空,则返回包含一个零的序列。
“小”表示“绝对值小”,由参数tol控制;“尾部”表示最高阶系数,例如,在[0, 1, 1, 0, 0](表示0 + x + x**2 + 0*x**3 + 0*x**4
)中,第3和第4阶系数都将被“修剪”。参数c是一个按从低阶到高阶排序的一维数组。参数tol是绝对值小于或等于tol的尾部元素将被删除。
步骤
首先,导入所需的库:
import numpy as np
from numpy.polynomial import hermite as H
使用numpy.array()方法创建一个数组。这是一个一维系数数组 –
c = np.array([0,5,0, 0,9,0])
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)
要从Hermite多项式中删除小的尾系数,可以使用Python Numpy中的hermite.hermtrim()方法。
print("\nResult...\n",H.hermtrim((c)))
示例
import numpy as np
from numpy.polynomial import hermite as H
# Create an array using the numpy.array() method
# This is the 1-d array of coefficients
c = np.array([0,5,0, 0,9,0])
# 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 remove small trailing coefficients from Hermite polynomial, use the hermite.hermtrim() method in Python Numpy.
print("\nResult...\n",H.hermtrim((c)))
输出
Our Array...
[0 5 0 0 9 0]
Dimensions of our Array...
1
Datatype of our Array object...
int64
Shape of our Array object...
(6,)
Result...
[0. 5. 0. 0. 9.]