将Laguerre级数转化为Python中的多项式
要将Laguerre级数转化为多项式,在Python NumPy中使用laguerre.lag2poly()方法。将表示Laguerre级数系数的数组,从最低次到最高次排序,转化为表示等效多项式系数的数组(相对于“标准”基底),从最低次到最高次排序。
该方法返回一个包含等效多项式系数的1维数组,从最低次到最高次排序。参数c是一个包含Laguerre级数系数的1维数组,从最低次到最高次排序。
步骤
首先,导入所需的库−
import numpy as np
from numpy.polynomial import laguerre as L
用numpy.array()方法创建一个数组-
c = np.array([1, 2, 3, 4, 5])
显示数组 –
print("Our Array...\n",c)
检查尺寸−
print("\nDimensions of our Array...\n",c.ndim)
获得数据类型 –
print("\nDatatype of our Array object...\n",c.dtype)
获取形状 −
print("\nShape of our Array object...\n",c.shape)
要将拉盖尔级数转换为多项式,在Python Numpy中使用laguerre.lag2poly()方法
print("\nResult (laguerre to polynomial)...\n",L.lag2poly(c))
示例
import numpy as np
from numpy.polynomial import laguerre as L
# Create an array using the numpy.array() method
c = np.array([1, 2, 3, 4, 5])
# 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 convert a Laguerre series to a polynomial, use the laguerre.lag2poly() method in Python Numpy
print("\nResult (laguerre to polynomial)...\n",L.lag2poly(c))
输出
Our Array...
[1 2 3 4 5]
Dimensions of our Array...
1
Datatype of our Array object...
int64
Shape of our Array object...
(5,)
Result (laguerre to polynomial)...
[ 15. -40. 22.5 -4. 0.20833333]