Arrange the matrix by replace a part to another part
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mohammed hussein
il 19 Lug 2021
Commentato: mohammed hussein
il 19 Lug 2021
Hi
I have 4 matrices as example, I would like to arrange these matrices to be one big matrix after keep only (the beginning of rows and columns) as this example
If I have
A1=ones(12);
A2=ones(9)*2;
A3=ones(6)*3;
A4=ones(4)*4;
I would like to find the final matrix after keep only the first 3 (the beginning of rows and columns in each matrix ) , so the final matriix should be like
ATOT=
[1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 2 2 2 2 2 2 2 2 2
1 1 1 2 2 2 2 2 2 2 2 2
1 1 1 2 2 2 2 2 2 2 2 2
1 1 1 2 2 2 3 3 3 3 3 3
1 1 1 2 2 2 3 3 3 3 3 3
1 1 1 2 2 2 3 3 3 3 3 3
1 1 1 2 2 2 3 3 3 4 4 4
1 1 1 2 2 2 3 3 3 4 4 4
1 1 1 2 2 2 3 3 3 4 4 4];
please i would like to specify the number of (the beginning of rows and columns) that should keep because i have diffrent size of matrices
thank you very much
2 Commenti
Aakash Deep Chhonkar
il 19 Lug 2021
Modificato: Aakash Deep Chhonkar
il 19 Lug 2021
Try indexing the matrix, https://www.mathworks.com/company/newsletters/articles/matrix-indexing-in-matlab.html
Also, focus on which part of the matrix you want to update rather than which part you want to preserve, this will clear the picture more.
Risposta accettata
Scott MacKenzie
il 19 Lug 2021
Assuming your matrices are conveniently sized...
A1=ones(12);
A2=ones(9)*2;
A3=ones(6)*3;
A4=ones(3)*4;
A = A1;
A(4:end,4:end) = A2;
A(7:end,7:end) = A3;
A(10:end,10:end) = A4
Output:
A =
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 2 2 2 2 2 2 2 2 2
1 1 1 2 2 2 2 2 2 2 2 2
1 1 1 2 2 2 2 2 2 2 2 2
1 1 1 2 2 2 3 3 3 3 3 3
1 1 1 2 2 2 3 3 3 3 3 3
1 1 1 2 2 2 3 3 3 3 3 3
1 1 1 2 2 2 3 3 3 4 4 4
1 1 1 2 2 2 3 3 3 4 4 4
1 1 1 2 2 2 3 3 3 4 4 4
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