MATLAB Programming/Sparse Matrices
A Sparse Matrix is a matrix that mostly contains zeros. In MATLAB, sparse matrices contrast regular ones in the way they are stored, such that memory is used more efficiently for matrices that are sparse.
A regular matrix can be converted to a sparse matrix using
>> S = sparse(A); % Create sparse representation of A
Sparse matrices are very common in engineering purposes. This is useful for manipulation as most of the matrix has a value of 0.