How do i do Matrix reordering (cutting into blocks)?

Say i have a matrix

A=[1 5 9 13 17 21.....

2 6 10 14 18 22......

3 7 11 15 19 23

4 8 12 16 20 24 .......]

And want to bring that into this shape

A_=[1 5 9 13

2 6 10 14

3 7 11 15

4 8 12 16

17 21 25 29

18 22 26 30

.....................]

Essentially cutting the above matrix into 4*4 and then continuing to the right and bring it down in to the new matrix.How do i do this?thank you

Answer 1

[James Tursa]

It's not exactly clear what the actual size of your matrix is (maybe you could clarify), but for what you have posted maybe this is what you want:

result = [A(:,1:4);A(:,5:8)];

EDIT:

Based on your comment below, it would be simpler to reshape the cell array first before you use cell2mat. E.g.,

A = [1 1 0 0 ; 1 1 1 0 ; 0 1 2 0; 1 0 0 1];
Q = cell2mat(arrayfun(@(i) A^i, (1:3)', 'Uni', false)); % transpose the 1:3

[ManvsMachine]

Actually what i am trying to do is

A = [1 1 0 0 ; 1 1 1 0 ; 0 1 2 0; 1 0 0 1];

Q = cell2mat(arrayfun(@(i) A^i, 1:3, 'Uni', false));

size(Q)%4*12 matrix

instead of manually doing , i would like to have reshape or similar command shape this matrix. into

[A

A^2]

A^3]

format

[ManvsMachine]

Thankyou very much,appreciate your time