petsc-3.14.6 2021-03-30
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
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| f | - the function
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| base | - differences are computed around this vector, see MatMFFDSetBase(), for Jacobians this is the point at which the Jacobian is being evaluated
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| ctx | - an optional context for the function
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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