在Python中使用浮點數陣列生成Hermite_e多項式的Vandermonde矩陣
要生成Hermite_e多項式的Vandermonde矩陣,請在Python NumPy中使用hermite_e.hermvander()。此方法返回偽Vandermonde矩陣。返回矩陣的形狀為x.shape + (deg + 1,),其中最後一個索引是相應Hermite多項式的階數。dtype將與轉換後的x相同。
引數x返回點陣列。dtype根據元素是否為複數轉換為float64或complex128。如果x是標量,則將其轉換為一維陣列。引數deg是結果矩陣的階數。
步驟
首先,匯入所需的庫:
import numpy as np from numpy.polynomial import hermite_e as H
建立一個數組:
x = np.array([0, 3.5, -1.4, 2.5])
顯示陣列:
print("Our Array...\n",c)檢查維度:
print("\nDimensions of our Array...\n",c.ndim)獲取資料型別:
print("\nDatatype of our Array object...\n",c.dtype)獲取形狀:
print("\nShape of our Array object...\n",c.shape)要生成Hermite_e多項式的Vandermonde矩陣,請使用hermite_e.hermvander()方法:
print("\nResult...\n",H.hermevander(x, 2))示例
import numpy as np
from numpy.polynomial import hermite_e as H
# Create an array
x = np.array([0, 3.5, -1.4, 2.5])
# Display the array
print("Our Array...\n",x)
# Check the Dimensions
print("\nDimensions of our Array...\n",x.ndim)
# Get the Datatype
print("\nDatatype of our Array object...\n",x.dtype)
# Get the Shape
print("\nShape of our Array object...\n",x.shape)
# To generate a Vandermonde matrix of the Hermite_e polynomial, use the hermite_e.hermvander() in Python Numpy
print("\nResult...\n",H.hermevander(x, 2))輸出
Our Array... [ 0. 3.5 -1.4 2.5] Dimensions of our Array... 1 Datatype of our Array object... float64 Shape of our Array object... (4,) Result... [[ 1. 0. -1. ] [ 1. 3.5 11.25] [ 1. -1.4 0.96] [ 1. 2.5 5.25]]
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