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
x - input vector

Output Parameters

A - Jacobian matrix
B - optional preconditioning matrix
flag - flag indicating matrix structure (one of, SAME_NONZERO_PATTERN,DIFFERENT_NONZERO_PATTERN,SAME_PRECONDITIONER)

Notes

Most users should not need to explicitly call this routine, as it is used internally within the nonlinear solvers.

See KSPSetOperators() for important information about setting the flag parameter.

Keywords

SNES, compute, Jacobian, matrix

See Also

SNESSetJacobian(), KSPSetOperators(), MatStructure

Level:developer
Location:src/snes/interface/snes.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages