在 Python 中獲取兩個多維陣列的內積


要獲取兩個多維陣列的內積,請在 Python 中使用 numpy.inner() 方法。1-D 陣列向量的普通內積,在更高維度中,是對最後幾個軸進行求和乘積。引數是 1 和 b,兩個向量。如果 a 和 b 是非標量,它們的最後維度必須匹配。

步驟

首先,匯入所需的庫 -

import numpy as np

使用 numpy array() 方法建立兩個二維陣列 −

arr1 = np.array([[5, 10], [15, 20]])
arr2 = np.array([[6, 12], [18, 24]])

顯示陣列 −

print("Array1...\n",arr1)
print("\nArray2...\n",arr2)

檢查兩個陣列的維度 −

print("\nDimensions of Array1...\n",arr1.ndim)
print("\nDimensions of Array2...\n",arr2.ndim)

檢查兩個陣列的形狀 −

print("\nShape of Array1...\n",arr1.shape)
print("\nShape of Array2...\n",arr2.shape)

要獲取兩個多維陣列的內積,請在 Python 中使用 numpy.inner() 方法。1-D 陣列向量的普通內積,在更高維度中,是對最後幾個軸進行求和乘積 −

print("\nResult (Inner Product)...\n",np.inner(arr1, arr2))

示例

import numpy as np

# Creating two numpy Two-Dimensional array using the array() method
arr1 = np.array([[5, 10], [15, 20]])
arr2 = np.array([[6, 12], [18, 24]])

# Display the arrays
print("Array1...\n",arr1)
print("\nArray2...\n",arr2)

# Check the Dimensions of both the arrays
print("\nDimensions of Array1...\n",arr1.ndim)
print("\nDimensions of Array2...\n",arr2.ndim)

# Check the Shape of both the arrays
print("\nShape of Array1...\n",arr1.shape)
print("\nShape of Array2...\n",arr2.shape)

# To get the Inner product of two multi-dimensional arrays, use the numpy.inner() method in Python
print("\nResult (Inner Product)...\n",np.inner(arr1, arr2))

輸出

Array1...
[[ 5 10]
[15 20]]

Array2...
[[ 6 12]
[18 24]]

Dimensions of Array1...
2

Dimensions of Array2...
2

Shape of Array1...
(2, 2)

Shape of Array2...
(2, 2)

Result (Inner Product)...
[[150 330]
[330 750]]

更新時間:2022-02-25

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