显示
disp(a)
disp(sprintf('2 decimal:%0.2f',a))
赋值一个矩阵
>> a = [1 2;3 4;5 6]
a =
1 2
3 4
5 6
>> a = [1 3;
4 5;
6 7;]
a =
1 3
4 5
6 7
>>
创建一个行向量 1x3
a = [1 2 3]
创建一个1-2，步率为0.1 的行向量1x11
>> v = 1:0.1:2
v =
Columns 1 through 3:
1.000000000000000 1.100000000000000 1.200000000000000
Columns 4 through 6:
1.300000000000000 1.400000000000000 1.500000000000000
Columns 7 through 9:
1.600000000000000 1.700000000000000 1.800000000000000
Columns 10 and 11:
1.900000000000000 2.000000000000000
创建一个列向量 3x1
>> a = [1;
2;
3;]
a =
1
2
3
>>
创建一个2x3都为1的矩阵
>> ones(2,3)
ans =
1 1 1
1 1 1
>>
创建一个2x3都为2的矩阵
>> c = 2*ones(2,3)
c =
2 2 2
2 2 2
>>
生成零矩阵
>> zeros(5,3)
ans =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
生成随机值矩阵
>> rand(2,3)
ans =
4.217561713195667e-01 9.834717266977976e-01 5.363337697224921e-01
2.508389749723528e-01 3.739405540199602e-01 8.304582722954202e-01
>>
生成服从高斯分布的矩阵，标准差或者方差为1
>> randn(1,3)
ans =
-5.496949005147392e-01 -9.804212148170880e-01 1.192527701401072e+00
>>
图形化生成数值分布
hist(w)
生成单位矩阵
>> eye(4)
ans =
Diagonal Matrix
1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1
>>