PETSc version 3.17.4
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# MatPreallocateFinalize

Ends the block of code that will count the number of nonzeros per row in a matrix providing the data that one can use to correctly preallocate the matrix.

### Synopsis

    #include <petscmat.h>
    PetscErrorCode MatPreallocateFinalize(PetscInt *dnz, PetscInt *onz)

Collective

### Input Parameters

| dnz | - the array that was be passed to the matrix preallocation routines
| onz | - the other array passed to the matrix preallocation routines

### Notes

See Users-Manual: ch_performance for more details.

Do not malloc or free dnz and onz that is handled internally by these routines

This is a MACRO not a function because it closes the { started in MatPreallocateInitialize().

### See Also

MatPreallocateInitialize(), MatPreallocateSet(), MatPreallocateSymmetricSetBlock(), MatPreallocateSetLocal(),
MatPreallocateSymmetricSetLocalBlock()

### Level

intermediate

### Location

src/mat/../../include/petscmat.h
Index of all Mat routines
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