## Matrices Mat: : Examples

PETSc matrices (Mat objects) are used to store Jacobians and other sparse matrices in PDE-based (or other) simulations.

ex1.c: Reads a PETSc matrix and vector from a file and reorders it
ex2.c: testing SeqDense matrices with an LDA (leading dimension of the user-allocated array) larger than M
ex4.c: Illustrate the use of MatResetPreallocation
ex8.c: Shows how to add a new MatOperation to AIJ MatType\n\n
ex9.c: Tests MatCreateComposite()\n\n
ex10.c: Reads a PETSc matrix and computes the 2 norm of the columns\n\n
ex11.c: Tests MatMeshToDual()\n\n
ex12.c: Reads a PETSc matrix and vector from a file; expands the matrix with the vector\n\n
ex15.c: Example of using graph partitioning to partition a graph\n\n
ex16.c: Reads a matrix from PETSc binary file
ex17.c: Example of using graph partitioning with a matrix in which some procs have empty ownership\n\n
ex18.c: Demonstrates the use of the COO interface to PETSc matrices for finite element computations\n\n
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