python 對角線矩陣_Python | 矩陣的對角線

python 對角線矩陣

Some problems in linear algebra are mainly concerned with diagonal elements of the matrix. For this purpose, we have a predefined function numpy.diag(a) in NumPy library package which automatically stores diagonal elements in an array (a Vector). In this article, we are going to print the diagonal elements of a matrix using inbuilt function numpy.diag(a).

線性代數中的一些問題主要與矩陣的對角線元素有關。 為此，我們在NumPy庫包中提供了預定義的函數numpy.diag(a)，該函數自動将對角線元素存儲在數組(向量)中。 在本文中，我們将使用内置函數numpy.diag(a)列印矩陣的對角線元素。

Python代碼查找矩陣的對角線 (Python code to find diagonal of a matrix)

# Linear Algebra Learning Sequence
# Diagonal of matrix

import numpy as np

print('Diagonal of an 3x3 identity matrix : ', np.diag(np.eye(3)))

a = np.arange(9).reshape((3,3))

print(' Matrix a : ', a)
print('Diagonal of Matrix a : ', np.diag(a))
           

Output: 輸出：

Diagonal of an 3x3 identity matrix :  [1. 1. 1.]
 Matrix a :  [[0 1 2]
 [3 4 5]
 [6 7 8]]
Diagonal of Matrix a :  [0 4 8]
           

翻譯自: https://www.includehelp.com/python/diagonal-of-a-matrix.aspx

python 對角線矩陣