petsc-3.12.1 2019-10-22
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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.

See Also

MatCreateSNESMF(),MatMFFDGetH(), MatCreateMFFD(), MATMFFD
MatMFFDSetHHistory(), MatMFFDResetHHistory(), SNESetFunction(), MatGetDiagonal()

Level

advanced

Location

src/mat/impls/mffd/mffd.c

Implementations

MatMFFDSetFunctioniBase_MFFD in src/mat/impls/mffd/mffd.c

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