| MATLAB Function Reference | |
Elementary Sparse Matrices
| spdiags | Sparse matrix formed from diagonals |
| speye | Sparse identity matrix |
| sprand | Sparse uniformly distributed random matrix |
| sprandn | Sparse normally distributed random matrix |
| sprandsym | Sparse random symmetric matrix |
Full to Sparse Conversion
| find | Find indices of nonzero elements |
| full | Convert sparse matrix to full matrix |
| sparse | Create sparse matrix |
| spconvert | Import from sparse matrix external format |
Working with Sparse Matrices
| issparse | True for sparse matrix |
| nnz | Number of nonzero matrix elements |
| nonzeros | Nonzero matrix elements |
| nzmax | Amount of storage allocated for nonzero matrix elements |
| spalloc | Allocate space for sparse matrix |
| spfun | Apply function to nonzero matrix elements |
| spones | Replace nonzero sparse matrix elements with ones |
| spparms | Set parameters for sparse matrix routines |
| spy | Visualize sparsity pattern |
Reordering Algorithms
| colamd | Column approximate minimum degree permutation |
| colmmd | Column minimum degree permutation |
| colperm | Column permutation |
| dmperm | Dulmage-Mendelsohn permutation |
| randperm | Random permutation |
| symamd | Symmetric approximate minimum degree permutation |
| symmmd | Symmetric minimum degree permutation |
| symrcm | Symmetric reverse Cuthill-McKee permutation |
Linear Algebra
| cholinc | Incomplete Cholesky factorization |
| condest | 1-norm condition number estimate |
| eigs | Eigenvalues and eigenvectors of sparse matrix |
| luinc | Incomplete LU factorization |
| normest | Estimate matrix 2-norm |
| sprank | Structural rank |
| svds | Singular values and vectors of sparse matrix |
Linear Equations (Iterative Methods)
| bicg | BiConjugate Gradients method |
| bicgstab | BiConjugate Gradients Stabilized method |
| cgs | Conjugate Gradients Squared method |
| gmres | Generalized Minimum Residual method |
| lsqr | LSQR implementation of Conjugate Gradients on Normal Equations |
| minres | Minimum Residual method |
| pcg | Preconditioned Conjugate Gradients method |
| qmr | Quasi-Minimal Residual method |
| spaugment | Form least squares augmented system |
| symmlq | Symmetric LQ method |
Tree Operations
| etree | Elimination tree |
| etreeplot | Plot elimination tree |
| gplot | Plot graph, as in "graph theory" |
| symbfact | Symbolic factorization analysis |
| treelayout | Lay out tree or forest |
| treeplot | Plot picture of tree |
| | Specialized Math | Math Constants | |