How to show Column and Row numbers in Matrix

I have a matrix

1 2 3
4 5 6
7 8 9

I want

- 1 2 3
1 1 2 3
2 4 5 6
3 7 8 9

[Jan]

Did you see, that the question looks funny without a proper formatting? I've marked the matrices and hit the "{} Code" button to make the question readable.

What should happen, when large values appear?

[Sahil Bajaj]

If it is 4*4 matrix

    - 1 2 3 4 
    1 1 0 0 0
    2 0 1 0 0
    3 0 0 1 0
    4 0 0 0 1

Answer 1

[Mohammad Abouali]

A=[1 2 3
   40 5 6
   7 800 9];

format = sprintf('%%%d',max(floor(log10(A(:)))+1));
fprintf([format 'c '],'-');
fprintf([format 'd '],1:size(A,2));
fprintf('\n');

for rowN=1:size(A,2)
    fprintf([format 'd '],[rowN, A(rowN,:)])
    fprintf('\n');
end

    -   1   2   3 
    1   1   2   3 
    2  40   5   6 
    3   7 800   9