petsc-3.7.7 2017-09-25
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MatCreateMPIMatConcatenateSeqMat

 Creates a single large PETSc matrix by concatenating sequential matrices from each processor

Synopsis

#include "petscmat.h" 
PetscErrorCode MatCreateMPIMatConcatenateSeqMat(MPI_Comm comm,Mat seqmat,PetscInt n,MatReuse reuse,Mat *mpimat)
Collective on MPI_Comm

Input Parameters

comm - the communicators the parallel matrix will live on
seqmat - the input sequential matrices
n - number of local columns (or PETSC_DECIDE)
reuse - either MAT_INITIAL_MATRIX or MAT_REUSE_MATRIX

Output Parameter

mpimat -the parallel matrix generated

Notes: The number of columns of the matrix in EACH processor MUST be the same.

Level:advanced
Location:src/mat/interface/matrix.c
Index of all Mat routines
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