1 # !usr/bin/env python 2 # Author:@vilicute 3 4 import numpy as np 5 # 矩阵的创建 6 matr1 = np.mat("4 2 3;4 5 6;7 8 9") 7 matr2 = np.matrix([[4,5,6],[7,8,9],[1,2,3]]) 8 print(" matr1= ",matr1) 9 print(" matr2= ",matr2) 10 11 arr1 = np.eye(3) 12 arr2 = arr1*3 13 arr3 = np.random.randint(0,10,size = [3,3]) 14 arr4 = np.random.randint(6,10,size = [3,3]) 15 matr3 = np.bmat("arr1 arr3;arr4 arr2") 16 print(" matr3= ",matr3) 17 18 19 # 矩阵的运算 20 matr_numul = matr1*4 21 matr_add = matr1 + matr2 22 matr_sub = matr1 - matr2 23 matr_mul = matr1 * matr2 24 matr_multiply = np.multiply(matr1, matr2) 25 print(" 数乘: ", matr_numul) 26 print(" 相加: ", matr_add) 27 print(" 相减: ", matr_sub) 28 print(" 相乘: ", matr_mul) 29 print(" 对应元素相乘: ", matr_multiply) 30 31 print(" 转置: ", matr1.T) 32 print(" 共轭转置: ", matr1.H) 33 print(" 求逆: ", matr1.I) 34 print(" 二维数组视图: ", matr1.A)
35 ''' 36 matr1= 37 [[4 2 3] 38 [4 5 6] 39 [7 8 9]] 40 matr2= 41 [[4 5 6] 42 [7 8 9] 43 [1 2 3]] 44 matr3= 45 [[1. 0. 0. 4. 8. 1.] 46 [0. 1. 0. 5. 3. 3.] 47 [0. 0. 1. 5. 1. 1.] 48 [6. 8. 8. 3. 0. 0.] 49 [9. 8. 8. 0. 3. 0.] 50 [9. 7. 7. 0. 0. 3.]] 51 数乘: 52 [[16 8 12] 53 [16 20 24] 54 [28 32 36]] 55 相加: 56 [[ 8 7 9] 57 [11 13 15] 58 [ 8 10 12]] 59 相减: 60 [[ 0 -3 -3] 61 [-3 -3 -3] 62 [ 6 6 6]] 63 相乘: 64 [[ 33 42 51] 65 [ 57 72 87] 66 [ 93 117 141]] 67 对应元素相乘: 68 [[16 10 18] 69 [28 40 54] 70 [ 7 16 27]] 71 转置: 72 [[4 4 7] 73 [2 5 8] 74 [3 6 9]] 75 共轭转置: 76 [[4 4 7] 77 [2 5 8] 78 [3 6 9]] 79 求逆: 80 [[ 0.33333333 -0.66666667 0.33333333] 81 [-0.66666667 -1.66666667 1.33333333] 82 [ 0.33333333 2. -1.33333333]] 83 二维数组视图: 84 [[4 2 3] 85 [4 5 6] 86 [7 8 9]] 87 '''