MatSetUp#

Sets up the internal matrix data structures for later use.

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatSetUp(Mat A)

Collective

Input Parameter#

A - the matrix

Notes#

If the user has not set preallocation for this matrix then an efficient algorithm will be used for the first round of setting values in the matrix.

If a suitable preallocation routine is used, this function does not need to be called.

This routine is called internally by other matrix functions when needed so rarely needs to be called by users

See Also#

Matrices, Mat, MatMult(), MatCreate(), MatDestroy(), MatXAIJSetPreallocation()

Level#

intermediate

Location#

src/mat/interface/matrix.c

Examples#

src/ksp/ksp/tutorials/ex1.c
src/ksp/ksp/tutorials/ex100.c
src/ksp/ksp/tutorials/ex100f.F90
src/ksp/ksp/tutorials/ex11.c
src/ksp/ksp/tutorials/ex11f.F90
src/ksp/ksp/tutorials/ex12.c
src/ksp/ksp/tutorials/ex15.c
src/ksp/ksp/tutorials/ex16.c
src/ksp/ksp/tutorials/ex18.c
src/ksp/ksp/tutorials/ex1f.F90
src/ksp/ksp/tutorials/ex23.c

Implementations#

MatSetUp_HYPREStruct in src/dm/impls/da/hypre/mhyp.c
MatSetUp_HYPRESStruct in src/dm/impls/da/hypre/mhyp.c
MatSetUp_MPIDense in src/mat/impls/dense/mpi/mpidense.c
MatSetUp_SeqDense in src/mat/impls/dense/seq/dense.c
MatSetUp_Elemental in src/mat/impls/elemental/matelem.cxx
MatSetUp_HYPRE in src/mat/impls/hypre/mhypre.c
MatSetUp_IS in src/mat/impls/is/matis.c
MatSetUp_KAIJ in src/mat/impls/kaij/kaij.c
MatSetUp_MAIJ in src/mat/impls/maij/maij.c
MatSetUp_Preallocator in src/mat/impls/preallocator/matpreallocator.c
MatSetUp_ScaLAPACK in src/mat/impls/scalapack/matscalapack.c
MatSetUp_MPISELL in src/mat/impls/sell/mpi/mpisell.c
MatSetUp_SeqSELL in src/mat/impls/sell/seq/sell.c

Index of all Mat routines
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Index of all manual pages