PETSc version 3.15.5
MatFDColoringSetFunction
Sets the function to use for computing the Jacobian. 
Synopsis
#include "petscmat.h" 
PetscErrorCode  MatFDColoringSetFunction(MatFDColoring matfd,PetscErrorCode (*f)(void),void *fctx)
Logically Collective on MatFDColoring
Input Parameters
|  | coloring | - the coloring context | 
|  | f | - the function | 
|  | fctx | - the optional user-defined function context | 
Calling sequence of (*f) function
For SNES:    PetscErrorCode (*f)(SNES,Vec,Vec,void*)
If not using SNES: PetscErrorCode (*f)(void *dummy,Vec,Vec,void*) and dummy is ignored
Notes
This function is usually used automatically by SNES (when one uses SNESSetJacobian() with the argument
SNESComputeJacobianDefaultColor()) and only needs to be used by someone computing a matrix via coloring directly by
calling MatFDColoringApply()
Fortran Notes
In Fortran you must call MatFDColoringSetFunction() for a coloring object to
be used without SNES or within the SNES solvers.
See Also
 MatFDColoringCreate(), MatFDColoringGetFunction(), MatFDColoringSetFromOptions()
Level
advanced
Location
src/mat/matfd/fdmatrix.c
Examples
src/snes/tutorials/ex14.c.html
src/tao/unconstrained/tutorials/minsurf2.c.html
Index of all MatFD routines
Table of Contents for all manual pages
Index of all manual pages