python3中numpy矩阵操作与线性方程组

 1 #encoding = utf-8
 2 #矩阵操作和线性方程组
 3 import numpy as np
 4 from numpy.linalg import *
 5 print(np.eye(3))
 6 list1 = np.array([[1,2],
 7                 [3,4]])
 8 print("Inv:")
 9 print(inv(list1))
10 print("T:")
11 print(list1.transpose())
12 print("Det:")
13 print(det(list1))
14 print(eig(list1))
15 print("Solve:")
16 y = np.array([[5],[7]])
17 print(solve(list1,y))
18 
19 运行结果：
20 [[ 1. 0. 0.]
21  [ 0.  1. 0.]
22  [ 0.  0.  1.]]
23 Inv:
24 [[-2.   1. ]
25  [ 1.5 -0.5]]
26 T:
27 [[1 3]
28  [2 4]]
29 Det:
30 -2.0
31 (array([-0.37228132,  5.37228132]), array([[-0.82456484, -0.41597356],
32        [ 0.56576746, -0.90937671]]))
33 Solve:
34 [[-3.]
35  [ 4.]]