petsc-3.13.6 2020-09-29
MatSeqAIJSetPreallocationCSR
Allocates memory for a sparse sequential matrix in AIJ format.
Synopsis
#include "petscmat.h"
PetscErrorCode MatSeqAIJSetPreallocationCSR(Mat B,const PetscInt i[],const PetscInt j[],const PetscScalar v[])
Input Parameters
| B | - the matrix
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| i | - the indices into j for the start of each row (starts with zero)
|
| j | - the column indices for each row (starts with zero) these must be sorted for each row
|
| v | - optional values in the matrix
|
The i,j,v values are COPIED with this routine; to avoid the copy use MatCreateSeqAIJWithArrays()
See Also
MatCreate(), MatCreateSeqAIJ(), MatSetValues(), MatSeqAIJSetPreallocation(), MatCreateSeqAIJ(), MATSEQAIJ
Level
developer
Location
src/mat/impls/aij/seq/aij.c
Implementations
MatSeqAIJSetPreallocationCSR_SeqAIJ in src/mat/impls/aij/seq/aij.c
Index of all Mat routines
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Index of all manual pages