基本运算
octave:3> 5+6 ans = 11 octave:4> 3-2 ans = 1 octave:5> 8*9 ans = 72 octave:6> 8/4 ans = 2 octave:7> 6/4 ans = 1.5000 octave:8> 2^6 ans = 64 octave:9>
注释：% 表示注释符号
octave:9> 1 == 2 %false
ans = 0
octave:10> 1~=2
ans = 1
octave:11> 1 && 0 % AND
ans = 0
octave:12> 1 || 0 % OR
ans = 1
octave:13> xor(1,0) % 异或
ans = 1
octave:14>
改变提示符： octave:14> PS1('>> '); ，' ' 内表示所选提示符
>> a=3 a = 3 >> a=3;%加上分号将不会显示 >> a a = 3 >> a=3; >> a=2 a = 2 >> a=2;%加上分号将不会显示
>> b='hi'
b = hi
>> c=(3>=1)
c = 1
>> a=pi
a = 3.1416
>> disp(a)
3.1416
>> disp(sprintf('2 decimals: %0.2f',a)) % 类似于C语言的输出语句
2 decimals: 3.14
矩阵和向量：
>> 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;2;3] V = 1 2 3 >> V=1:0.1:2 V = Columns 1 through 7: 1.0000 1.1000 1.2000 1.3000 1.4000 1.5000 1.6000 Columns 8 through 11: 1.7000 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 >> C=[2 2 2;2 2 2] C = 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 = 0.76244 0.97843 0.82005 >> w=rand(3,3) %产生随机数矩阵，范围0~1 w = 0.844846 0.070033 0.276175 0.330128 0.777480 0.369802 0.015571 0.482700 0.163547 >> w = randn(1,3) %产生服从高斯分量的随机矩阵 w = 0.63218 0.16167 -0.34970 >>
绘制直方图：
>> w=-6 + sqrt(10)*(randn(1,10000));
>> hist(w)
绘制更多竖条的直方图（50个）：
>> hist(w,50)
单位矩阵：
>> i=eye(4) i = Diagonal Matrix 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1
可输入help命令获得帮助，如：
help eye
help rand