MATLAB: How can i create only the Matrix index

Question

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

The easiest way is

sparse(list_of_row_indices, list_of_corresponding_column_indices, list_of_corresponding_values)

You can full() the result afterwards.