petsc-3.7.1 2016-05-15
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MatCreateSeqAIJFromTriple

Creates an sequential AIJ matrix using matrix elements (in COO format) provided by the user.

Synopsis

#include "petscmat.h" 
PetscErrorCode  MatCreateSeqAIJFromTriple(MPI_Comm comm,PetscInt m,PetscInt n,PetscInt *i,PetscInt *j,PetscScalar *a,Mat *mat,PetscInt nz,PetscBool idx)
Collective on MPI_Comm Many br

Input Parameters

comm - must be an MPI communicator of size 1 Many br
m - number of rows Many br
n - number of columns Many br
i - row indices Many br
j - column indices Many br
a - matrix values Many br
nz - number of nonzeros Many br
idx - 0 or 1 based Many br

Output Parameter

mat -the matrix Many br

Many br

Notes

The i and j indices are 0 based Many br

The format which is used for the sparse matrix input, is equivalent to a Many brrow-major ordering.. i.e for the following matrix, the input data expected is Many br

as shown

1 0 0 Many br2 0 3 Many br4 5 6 Many br

i = {0,1,1,2,2,2} Many brj = {0,0,2,0,1,2} Many brv = {1,2,3,4,5,6} Many br

See Also

MatCreate(), MatCreateAIJ(), MatCreateSeqAIJ(), MatCreateSeqAIJWithArrays(), MatMPIAIJSetPreallocationCSR()

Level:intermediate
Location:
src/mat/impls/aij/seq/aij.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages