Question

矩阵中元素也是矩阵如何运算

假设A=[ a b ] ;B=[ c d ]; C=[ e f ] ;D=[A B]。那么C*D该怎么算？

Answer 1

>> A=rand(3,4)
A =
0.8147 0.9134 0.2785 0.9649
0.9058 0.6324 0.5469 0.1576
0.1270 0.0975 0.9575 0.9706
>> B=A(2,:)
B =
0.9058 0.6324 0.5469 0.1576
>> C=A(:,3)
C =
0.2785
0.5469
0.9575