Multiplying 3D matrices
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To 3d-Matrix:
How can i multiplicate two 3d-Matrizes?
When i use following code:
A1=[1,2;3,4];
B1=[5,6;7,8];
C1=[9,10;11,12];
Z1=cat(3,A1,B1,C1)
A2=[1,2;3,4];
B2=[5,6;7,8];
C2=[9,10;11,12];
Z2=cat(3,A2,B2,C2)
Z=Z1*Z2
Then comes this Error:
Error using *
Arguments must be 2-D, or at least one argument must be scalar. Use TIMES (.*) for elementwise multiplication.
But when I use (.*), its the wrong multiplication, because its elementwise and i want a matrixmultiplication.
The result of the first array with .* is
Z(:,:,1) =
1 4
9 16
But it should be like
>> A1 * A2
ans =
7 10
15 22
Maybe someone can help.
采纳的回答
Bruno Luong
2019-8-20
0 个投票
There is no stock function (what a MATRIX LABORATORY doesn't have such feature?), but here it is MTIMESX
2 个评论
Aj
2019-8-20
Bruno Luong
2019-8-20
编辑：Bruno Luong
2019-8-20
A1=[1,2;3,4];
B1=[5,6;7,8];
C1=[9,10;11,12];
Z1=cat(3,A1,B1,C1)
A2=[1,2;3,4];
B2=[5,6;7,8];
C2=[9,10;11,12];
Z2=cat(3,A2,B2,C2)
Z=mtimesx(Z1,Z2) % HERE IT IS, SO SIMPLE
Z1(:,:,1) =
1 2
3 4
Z1(:,:,2) =
5 6
7 8
Z1(:,:,3) =
9 10
11 12
Z2(:,:,1) =
1 2
3 4
Z2(:,:,2) =
5 6
7 8
Z2(:,:,3) =
9 10
11 12
Z(:,:,1) =
7 10
15 22
Z(:,:,2) =
67 78
91 106
Z(:,:,3) =
191 210
231 254
>>
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