Combining 3d matrices

2019 4 2
1 个回答
更新时间：2021 7 8
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I have in total 4 matrices each of size (m)x(n)x(p) .. Lets say these matrices are called a,b,c and d.
I need to combine them in such a way that I would get a resulting matrix of size 2m x 2n x 2p, with the 2m coming from a and b, 2n from a and c, and 2p from a and d.
I can get the corresponding 2m x n x p and etc. using cat(1,a,b), cat (2,a,c) etc, but am unable to figure out the rest (or if this is even the right direction). Any help is appreciated.
Thanks!

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Matt J
Matt J 2019-4-2
编辑：Matt J 2019-4-2

4 个投票

Your description doesn't define the new matrix well enough. The result will have 8 times as many entries, but you only have 4 matrices to draw data from, so it is not clear where all the additional entries will come from.
However, here is one of many possibilities,
L1=[a,c;b,c];
L2=[d,d;d,d];
result=cat(3,L1,L2);

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Prodip Das
Prodip Das 2019-4-3
编辑：Prodip Das 2019-4-4
EDIT: Sorry for the confusion, there are (have to be) 8 matrices in-fact - As correctly pointed out by you. I had to combine them (matrices a-h) in specific order - which I got by doing something as simple as
N(1:2:m*2, 1:2:n*2, 1:2:p*2) = a(:,:,:);
N(2:2:m*2, 1:2:n*2, 1:2:p*2) = b(:,:,:);
N(1:2:m*2, 2:2:n*2, 1:2:p*2) = c(:,:,:);
and so on for the rest... resulting in N being the 2mx2nx2p matrix.
Thanks!
I can remove/edit this query if this seems redundant now.
Thank you, it helped me too!
Matt J
Matt J 2021-7-8
I'm glad, but if so please Accept-click the asnwer.

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Matt J
Matt J
2021-7-8

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