Matlab
clc : 清空命令行窗口
clear all ： 清空工作区
Matlab的数据类型：
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数字
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字符和字符串
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矩阵
A = [1 2 3; 4 5 6; 7 8 9]
A( : , 1:2)
B = A’ % A的转置
C = A( % 将A矩阵拉长，一列一列的拉长
D = inv(A) % A矩阵的逆
E = zeros(10, 5, 3) % 创建全是0的10行5列三维矩阵A =
1 2 3 4 5 6 7 8 9
ans =
1 2 4 5 7 8
B =
1 4 7 2 5 8 3 6 9
C =
1 4 7 2 5 8 3 6 9
警告: 矩阵接近奇异值，或者缩放错误。结果可能不准确。RCOND = 1.541976e-18。
D =
1.0e+16 * -0.4504 0.9007 -0.4504 0.9007 -1.8014 0.9007 -0.4504 0.9007 -0.4504E(:,:,1) =
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
E(:,:,2) =
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
E(:,:,3) =
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
rand生成均匀分布的伪随机数
randn生成标准正态分布的伪随机数
randi生成均匀分布的伪随机整数
E(:,:,1) = rand(10, 5) E(:,:,2) = randi(5, 10, 5) E(:,:,3) = randn(10, 5)
E(:,:,1) = rand(10, 5)
E(:,:,1) =
0.1192 0.9937 0.7720 0.4849 0.7549 0.9398 0.2187 0.9329 0.3935 0.2428 0.6456 0.1058 0.9727 0.6714 0.4424 0.4795 0.1097 0.1920 0.7413 0.6878 0.6393 0.0636 0.1389 0.5201 0.3592 0.5447 0.4046 0.6963 0.3477 0.7363 0.6473 0.4484 0.0938 0.1500 0.3947 0.5439 0.3658 0.5254 0.5861 0.6834 0.7210 0.7635 0.5303 0.2621 0.7040 0.5225 0.6279 0.8611 0.0445 0.4423
E(:,:,2) =
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
E(:,:,3) =
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
E(:,:,2) = randi(5, 10, 5)
E(:,:,1) =
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
E(:,:,2) =
4 3 1 1 5 3 4 1 3 1 5 1 1 5 1 3 4 4 5 1 1 2 2 2 1 1 1 3 2 4 5 3 4 3 3 3 1 3 4 1 5 1 3 3 5 2 2 3 2 4
E(:,:,3) =
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
E(:,:,3) = randn(10, 5)
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E(:,:,1) =
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
E(:,:,2) =
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
E(:,:,3) =
-1.1933 1.0533 -1.4245 0.5411 0.8535 0.6470 -0.7489 0.7174 -1.5409 -1.8530 -0.3536 -0.9363 -0.7779 -0.2031 -0.2073 0.0464 -1.2691 0.3160 -0.5000 0.2704 -0.7929 0.4980 1.4065 0.3830 -0.6528 -1.5505 2.7891 0.4011 0.4120 0.4772 0.1716 0.7276 0.9297 0.4055 -0.0713 -0.0621 -0.7731 -1.6058 -0.3638 -0.9383 1.1990 0.8366 0.6615 -0.5993 0.1614 0.8017 -1.1283 2.1385 -0.5896 -0.2682 -
元胞数组：一种数组，可以包含不同数据类型的元素的数组，相当于C语言中的结构体。
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结构体
结构体相当于python中的字典（set）有键值对。
