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

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Lars Urban
Lars Urban 2022-5-10
评论： KSSV 2022-5-10
Ran in:
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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采纳的回答

KSSV
KSSV 2022-5-10
Ran in:
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
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 :)

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更多回答（1 个）

Davide Masiello
Davide Masiello 2022-5-10
编辑：Davide Masiello 2022-5-10
Ran in:
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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