petsc-3.7.7 2017-09-25
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MatMFFDSetHHistory

 Sets an array to collect a history of the differencing values (h) computed for the matrix-free product.

Synopsis

#include "petscmat.h"   
PetscErrorCode  MatMFFDSetHHistory(Mat J,PetscScalar history[],PetscInt nhistory)
Logically Collective on Mat

Input Parameters

J - the matrix-free matrix context
histroy - space to hold the history
nhistory - number of entries in history, if more entries are generated than nhistory, then the later ones are discarded

Notes

Use MatMFFDResetHHistory() to reset the history counter and collect a new batch of differencing parameters, h.

Keywords

SNES, matrix-free, h history, differencing history

See Also

MatMFFDGetH(), MatCreateSNESMF(),
MatMFFDResetHHistory(), MatMFFDSetFunctionError()

Level:advanced
Location:src/mat/impls/mffd/mffd.c
Index of all Mat routines
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Index of all manual pages