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; No Fortran Support
Input Parameters#
- mat - the - MATSHELLshell 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_TRUEif the multiply is likely correct
Options Database Key#
- -mat_shell_test_mult_view - print if any differences are detected between the products and print the difference 
See Also#
Matrices, Mat, MATSHELL, MatCreateShell(), MatShellGetContext(), MatShellGetOperation(), MatShellTestMultTranspose()
Level#
advanced
Location#
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages