做外国网站怎么买空间/网络营销题库案例题
A = [1,2,3;4,5,6;7,8,9;10,11,12]
A =
1 2 3
4 5 6
7 8 9
10 11 12v = [1;2;3]
v =
1
2
3[m,n] = size(A)
m =
4
n =
3dim_A = size(A)
dim_A =
4 3dim_v = size(v)
dim_v =
3 1A_23 = A(2,3)
A_23 =
6
A = [1,2,3;4,5,6;7,8,9;10,11,12]
A =
1 2 3
4 5 6
7 8 9
10 11 12v = [1;2;3]
v =
1
2
3[m,n] = size(A)
m =
4
n =
3dim_A = size(A)
dim_A =
4 3dim_v = size(v)
dim_v =
3 1A_23 = A(2,3)
A_23 =
6