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Add value at new position automatically to matrix

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Fabian Haslwanter
编辑： Stephen23 2023-1-3
Ran in:
Hello there, following problem:
I have a matrix A. For an algorithm a value should be added in the last place of a new row and column, rest filled with 0. I tried this in B but the result should look like in C. Is there an easy way to do this without manually adding an additional column and row?
Thank you very much!
A = [1 2 3;4 5 6]
A = 2×3
1 2 3 4 5 6
B = {A 0;0 1}
B = 2×2 cell array
{2×3 double} {[0]} {[ 0]} {[1]}
C = [1 2 3 0;4 5 6 0;0 0 0 1]
C = 3×4
1 2 3 0 4 5 6 0 0 0 0 1
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Torsten
Torsten 2023-1-3
Ran in:
Yes, it's fine.
Or
A = [1 2 3;4 5 6];
value = 1.0;
A = [A,zeros(size(A,1),1);zeros(1,size(A,2)),value]
A = 3×4
1 2 3 0 4 5 6 0 0 0 0 1
Stephen23
Stephen23 2023-1-3
编辑：Stephen23 2023-1-3
Ran in:
"This is my current solution:"
Just use BLKDIAG or basic MATLAB indexing:
A = [1,2,3;4,5,6];
A(end+1,end+1) = 1
A = 3×4
1 2 3 0 4 5 6 0 0 0 0 1

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Matt J
Matt J 2023-1-3
编辑：Matt J 2023-1-3
Ran in:
A = [1 2 3;4 5 6];
C=[A, zeros(2,1);
zeros(1,3) , 1 ]
C = 3×4
1 2 3 0 4 5 6 0 0 0 0 1
or
C=blkdiag(A,1)
C = 3×4
1 2 3 0 4 5 6 0 0 0 0 1

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