MATLAB Function Reference

Sparse Matrix Functions

Elementary Sparse Matrices
spdiags	Extract and create sparse band and diagonal matrices
speye	Sparse identity matrix
sprand	Sparse uniformly distributed random matrix
sprandn	Sparse normally distributed random matrix
sprandsym	Sparse symmetric random matrix
Full to Sparse Conversion
find	Find indices and values of nonzero elements
full	Convert sparse matrix to full matrix
sparse	Create sparse matrix
spconvert	Import matrix from sparse matrix external format
Working with Nonzero Entries of Sparse Matrices
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 sparse matrix elements
spones	Replace nonzero sparse matrix elements with ones
Visualizing Sparse Matrices
spy	Visualize sparsity pattern
Reordering Algorithms
colamd	Column approximate minimum degree permutation
colmmd	Sparse column minimum degree permutation
colperm	Sparse column permutation based on nonzero count
dmperm	Dulmage-Mendelsohn decomposition
randperm	Random permutation
symamd	Symmetric approximate minimum degree permutation
symmmd	Sparse symmetric minimum degree ordering
symrcm	Sparse reverse Cuthill-McKee ordering
Norm, Condition Number, and Rank
condest	1-norm matrix condition number estimate
normest	2-norm estimate
Sparse Systems of Linear Equations
bicg	BiConjugate Gradients method
bicgstab	BiConjugate Gradients Stabilized method
cgs	Conjugate Gradients Squared method
cholinc	Sparse Incomplete Cholesky and Cholesky-Infinity factorizations
cholupdate	Rank 1 update to Cholesky factorization
gmres	Generalized Minimum Residual method (with restarts)
lsqr	LSQR implementation of Conjugate Gradients on the normal equations
luinc	Incomplete LU matrix factorizations
pcg	Preconditioned Conjugate Gradients method
qmr	Quasi-Minimal Residual method
qr	Orthogonal-triangular decomposition
qrdelete	Delete column from QR factorization
qrinsert	Insert column in QR factorization
qrupdate	Rank 1 update to QR factorization
Sparse Eigenvalues and Singular Values
eigs	Find eigenvalues and eigenvectors
svds	Find singular values
Miscellaneous
spparms	Set parameters for sparse matrix routines

Function Functions - Nonlinear Numerical Methods

Sound Processing Functions