petsc-3.8.4 2018-03-24
MatMFFDSetFunctioniBase
Sets the base vector for a single component function evaluation
Synopsis
#include "petscmat.h"
PetscErrorCode MatMFFDSetFunctioniBase(Mat mat,PetscErrorCode (*func)(void*,Vec))
Logically Collective on Mat
Input Parameters
| mat | - the matrix free matrix created via MatCreateSNESMF()
|
| func | - the function to use
|
Notes
If you use this you MUST call MatAssemblyBegin()/MatAssemblyEnd() on the matrix free
matrix inside your compute Jacobian routine.
This function is necessary to compute the diagonal of the matrix.
Keywords
SNES, matrix-free, function
See Also
MatCreateSNESMF(),MatMFFDGetH(), MatCreateMFFD(), MATMFFD
MatMFFDSetHHistory(), MatMFFDResetHHistory(), SNESetFunction(), MatGetDiagonal()
Level:advanced
Location:src/mat/impls/mffd/mffd.c
Index of all Mat routines
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Index of all manual pages