How to create an array of matrices?
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If I have 3 matrices:
A = [1 2 ; 3 4]
B = [5 6 ; 7 8]
C = [9 10 ; 11 12]
And I want to create a greater matrix with these inside like D = [A ; B ; C], that would result in something like:
D = [1 2 ; 5 6 ; 9 10
3 4 ; 7 8 ; 11 12 ]
I have tried writing something as simple as
D = [A , B , C]
But this solely puts all these matrices side by side into a single matrix, whilst I intend to keep them all separately in an array, to create a "row" of matrices...
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Answers (3)
the cyclist
on 23 Jan 2022
Edited: the cyclist
on 23 Jan 2022
A = [1 2 ; 3 4];
B = [5 6 ; 7 8];
C = [9 10 ; 11 12];
D = {A, B, C}
I think the best answer will depend on what you are planning on doing with the result afterward.
the cyclist
on 23 Jan 2022
Given your comment on my other answer, another possible solution is to stack the matrices as slices in a 3rd dimension:
A = [1 2 ; 3 4];
B = [5 6 ; 7 8];
C = [9 10 ; 11 12];
D = cat(3,A,B,C);
for ii = 1:3
D(:,:,ii)
end
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Thomas
on 22 Jun 2023
function aM = arrayofmatrices(A,B,C)
aM(:,:,1) = A;
aM(:,:,2) = B;
aM(:,:,3) = C;
end
This only works when A, B and C have the same sidelenths. If not you need a cell array.
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