SNESComputeJacobian
Computes the Jacobian matrix that has been set with SNESSetJacobian().
Synopsis
#include "petscsnes.h"
PetscErrorCode PETSCSNES_DLLEXPORT SNESComputeJacobian(SNES snes,Vec X,Mat *A,Mat *B,MatStructure *flg)
Collective on SNES and Mat
Input Parameters
| snes | - the SNES context
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| x | - input vector
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Output Parameters
| A | - Jacobian matrix
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| B | - optional preconditioning matrix
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| flag | - flag indicating matrix structure (one of, SAME_NONZERO_PATTERN,DIFFERENT_NONZERO_PATTERN,SAME_PRECONDITIONER)
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Options Database Keys