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

2 views (last 30 days)
Lars Urban
Lars Urban on 10 May 2022
Commented: KSSV on 10 May 2022
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?

Accepted Answer

KSSV
KSSV on 10 May 2022
A = [1,2;3,4] ;
B = repmat(A,1,2)
B = 2×4
1 2 1 2 3 4 3 4
  4 Comments

Sign in to comment.

More Answers (1)

Davide Masiello
Davide Masiello on 10 May 2022
Edited: Davide Masiello on 10 May 2022
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

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!