Sparse Matrices
When a matrix has a large number of Os, it is advantageous to express it in sparse form to reduce storage requirements. Function sparse converts a matrix to sparse form by “squeezing out” all zero elements. The basic syntax for this function is :
Z1 = sparse(Z)
Example
>> Z = [1 0 3; 0 5 6; 0 9 0]
Z =
1 0 3
0 5 6
0 9 0
>> Z1 = sparse(Z)
Z1 =
(1,1) 1
(2,2) 5
(3,2) 9
(1,3) 3
(2,3) 6
