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# Changes: 2.2.0
```{rubric} General:
```
- Changed petscengine.h to petscmatlab.h
- Changed PetscOptionsEList() to return the index of the string
selected by the user (error if user enters impossible string)
```{rubric} Vec:
```
- VecLoad() has a new argument giving the Vector type to be created
```{rubric} Mat:
```
- If you use MAT_SYMMETRIC as option for MatSetOption() you will
likely need to also use the option MAT_SYMMETRY_ETERNAL otherwise
at the next MatAssembly the matrix will likly lose the symmetry
flag.
- Added MatISGetLocalMat() to allow preallocating the local matrix.
```{rubric} PC:
```
```{rubric} KSP:
```
- changed unmodifiedGramSchmidt name to classicalGramSchmidt
everywhere.
- Eliminated KSPGMRESIROrthogonalize() now have
KSPGMRESSetCGSRefinement() to decide when to use iterative
refinement
- The SLES object has been removed from PETSc. All of this options
are available via the KSP object. For example, -sles_view_binary
->ksp_view_binary, SLESCreate()->KSPCreate() The calling sequences
SLESSetUp(sles,b,x) should be replaced with KSPSetRhs(ksp,b)
KSPSetSolution(ksp,x) KSPSetUp(ksp). Similarly SLESSolve(sles,b,x)
should be replaced with KSPSetRhs(ksp,b) KSPSetSolution(ksp,x)
KSPSolve(ksp)
- removed its argument from KSPSolve. Obtain the number of
iterations via KSPGetIterationNumber()
```{rubric} SNES:
```
- SNESSolve() no longer returns number of iterations, use
SNESGetIterationNumber() to get the number of iterations required
```{rubric} TS:
```
```{rubric} DMMG:
```
- Added support for -dmmg_galerkin and DMMGSetUseGalerkin() for
nonlinear problems (not sequential only)
```{rubric} SYS:
```
- added new PETSC_VIEWER_MATLAB for saving variables to MATLAB .mat
files
- eliminated PetscViewerXXXXType and PetscViewerXXXSetType()
replaced with PetscViewerFileType and PetscViewerSetFileType()
- PETSC_BINARY_RDONLY,PETSC_BINARY_WRONLY,PETSC_BINARY_CREATE
becomes PETSC_FILE_RDONLY,PETSC_FILE_WRONLY,PETSC_FILE_CREATE
```{rubric} Fortran:
```
```{rubric} ExternalPackages:
```
|
