petsc-3.12.5 2020-03-29
MatShellTestMult
Compares the multiply routine provided to the MATSHELL with differencing on a given function.
Synopsis
#include "petscmat.h"
PetscErrorCode MatShellTestMult(Mat mat,PetscErrorCode (*f)(void*,Vec,Vec),Vec base,void *ctx,PetscBool *flg)
Logically Collective on Mat
Input Parameters
| mat | - the shell matrix
|
| f | - the function
|
| base | - differences are computed around this vector, see MatMFFDSetBase(), for Jacobians this is the point at which the Jacobian is being evaluated
|
| ctx | - an optional context for the function
|
Output Parameter
flg -PETSC_TRUE if the multiply is likely correct
Options Database
-mat_shell_test_mult_view -print if any differences are detected between the products and print the difference
Fortran Notes
Not supported from Fortran
See Also
MatCreateShell(), MatShellGetContext(), MatShellGetOperation(), MatShellTestMultTranspose()
Level
advanced
Location
src/mat/impls/shell/shell.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages