1 >> A = [1,2,3;4,5,6]
 2 
 3 A =
 4 
 5      1     2     3
 6      4     5     6
 7 
 8 >> [r,c] = size(A)
 9 
10 r =
11 
12      2
13 
14 
15 c =
16 
17      3
18 
19 >> size(A,1)
20 
21 ans =
22 
23      2
24 
25 >> size(A,2)
26 
27 ans =
28 
29      3

1 % 判断x是否为列向量，最后都调整为行向量
2 if size(x,2) == 1
3     x = x\';
4 end
5 
6 % 判断x是否为行向量，最后都调整为列向量
7 if size(x,1) == 1
8     x = x\';
9 end