how can i create only the Matrix index

Hi i would like to create two variable that represent the matrix index of any size of matrix for example if i have matrix

A=[(1,1) (1,2) (1,3);(2,1) (2,2) (2,3);(3,1) (3,2) (3,3)]

how can i create like the matrix A

thank you

Answer 1

[Walter Roberson]

The easiest way is

sparse(list_of_row_indices, list_of_corresponding_column_indices, list_of_corresponding_values)

You can full() the result afterwards.

[mohammed hussein]

thank you very much for your answer , i want to create only the index of any matrix . this what i am trying to built but it doesn't work

for ii=1:1:3

for j=1:1:3

 A=[ii,j]
end
end

[Walter Roberson]

[R,C] = ndgrid(1:size(YourMatrix,1), 1:size(YourMatrix,2));
A = idxMatrix = arrayfun(@(r,c) [r,c], R, C, 'uniform', 0);

[mohammed hussein]

thank you very much , it works perfectly