Adding every loop a matrix from the right side to a matrix

2022 5 10
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I want to add after one loop a matrix to a matrix that was calculated one loop before. For example in the first loop the matrix would be 2x2 after second loop 2x4 and the next one 2x6 ...
I know that "manually" it would be i think like this
A = [1,2;3,4]
A = 2×2
1 2 3 4
B(:,1:2) = A
B = 2×2
1 2 3 4
B(:,3:4) = A
B = 2×4
1 2 1 2 3 4 3 4
But how would this look like in a loop?

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KSSV
KSSV 2022-5-10
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A = [1,2;3,4] ;
B = repmat(A,1,2)
B = 2×4
1 2 1 2 3 4 3 4

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Lars Urban
Lars Urban 2022-5-10
编辑：Lars Urban 2022-5-10
Yes it works allmost. For 2 of 3 matrices it works fine but for one matrix if we take the example it not makes a 2x4 it makes a 4x4. Or like in my case it make from a 14x2 a 28x4 and not 14x4. Could it be that the entries change and repmat would not work ?
KSSV
KSSV 2022-5-10
Show us what exact matrix you want to make.
Lars Urban
Lars Urban 2022-5-10
Sorry the problem why it was creating a bigger matrix after a loop was because i had a mistake before repmat. Problem solved thank you for the help :)
KSSV
KSSV 2022-5-10
Glad it worked for you.
Happy coding in MATLAB. :)

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Davide Masiello
Davide Masiello 2022-5-10
编辑：Davide Masiello 2022-5-10
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In the example below, a new 2x2 random matrix is created at each new iteration and appended to an existing matrix A.
clear,clc
A = [];
for i = 1:10
B = rand(2,2);
A = [A,B];
end
A
A = 2×20
0.3994 0.6342 0.9210 0.0792 0.5605 0.1604 0.5920 0.6461 0.9130 0.8542 0.8578 0.3106 0.6250 0.0873 0.7464 0.4444 0.7945 0.1335 0.2230 0.5452 0.6890 0.5618 0.7523 0.2968 0.8271 0.6431 0.2080 0.2957 0.9066 0.7982 0.6292 0.7462 0.0664 0.8576 0.5080 0.5076 0.3264 0.3242 0.8307 0.2477

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