[問題] 見鬼了...竟然不相等已回收
>> M = [1 2 3 4; 5 6 7 8; 4 3 2 1]
M =
1 2 3 4
5 6 7 8
4 3 2 1
>> C=[M(:,1),M(:,2)] \ M(:,3)
C =
-1.0000
2.0000
>> C(1,1)*M(:,1)+C(2,1)*M(:,2) == M(:,3)
ans =
0
0
0
>> C(1,1)*M(:,1)+C(2,1)*M(:,2)
ans =
3.0000
7.0000
2.0000
>> M(:,3)
ans =
3
7
2
>> 3.000 == 3
ans =
1
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