1.加减乘除幂
octave:5> 6+6
ans = 12
octave:6> 1/2
ans = 0.50000
octave:7> 5*8
ans = 40
octave:8> 2^3
ans = 8
2.等于/不等/注释/与/或/异或
octave:9> 1==2 %false
ans = 0
octave:10> 1~=2 %true
ans = 1
octave:11> 1&&0 % and
ans = 0
octave:12> 1||0 % or
ans = 1
octave:13> xor(1,0)
ans = 1
3.改变命令符号
octave:14> PS1('>>');
4.变量
>>a=3
a = 3
>>a=3;
>>a
a = 3
>>a=3;% semicolon supressing output
>>b='hi';
>>b
b = hi
>>a=pi;
>>a
a = 3.1416
>>disp(a);
3.1416
>>disp(sprintf('2 decimals:%0.2f',a))
2 decimals:3.14
>>disp(sprintf('2 decimals:%0.4f',a))
2 decimals:3.1416
>>format long
>>a
a = 3.141592653589793
>>format short
>>a
a = 3.1416
5.矩阵
>>A=[1 2;3 4;5 6]
A =
1 2
3 4
5 6
>>A=[1 2;
> 3 4；
> 5 6]
A =
1 2
3 4
5 6
>>V=[1;
> 2;
> 3]
V =
1
2
3
>>V=1:0.1:2 %行向量
V =
Columns 1 through 8:
1.0000 1.1000 1.2000 1.3000 1.4000 1.5000 1.6000 1.7000
Columns 9 through 11:
1.8000 1.9000 2.0000
>>V=1:6
V =
1 2 3 4 5 6
>>ones(2,3)
ans =
1 1 1
1 1 1
>>2*ones(2,3)
ans =
2 2 2
2 2 2
>>w=ones(1,3)
w =
1 1 1
>>w=zeros(1,3)
w =
0 0 0
>>w=rand(1,3)
w =
0.20737 0.49201 0.55104
>>w=rand(3,3)
w =
0.38282 0.24781 0.50397
0.32993 0.10644 0.54189
0.33615 0.13661 0.26884
>>w=randn(1,3)
w =
-0.13863 0.70373 0.65798
>>h=-6+sqrt(10)*(randn(1,10000));
>>hist(h)
>>eye(4)
ans =
Diagonal Matrix
1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1
