MatUpdateMPIAIJWithArrays — PETSc 3.24.5 documentation

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# MatUpdateMPIAIJWithArrays

updates a `MATMPIAIJ` matrix using arrays that contain in standard CSR format for the local rows. Only the numerical values are updated the other arrays must be identical to what was passed from `MatCreateMPIAIJWithArrays()`

## Synopsis

    #include "petscmat.h"
    PetscErrorCode MatUpdateMPIAIJWithArrays(Mat mat, PetscInt m, PetscInt n, PetscInt M, PetscInt N, const PetscInt Ii[], const PetscInt J[], const PetscScalar v[])

Deprecated: Use `MatUpdateMPIAIJWithArray()`

Collective

## Input Parameters

- mat - the matrix

- m - number of local rows (Cannot be `PETSC_DECIDE`)

- n - This value should be the same as the local size used in creating the x vector for the matrix-vector product y = Ax. (or `PETSC_DECIDE` to have calculated if N is given) For square matrices n is almost always m.

- M - number of global rows (or `PETSC_DETERMINE` to have calculated if m is given)

- N - number of global columns (or `PETSC_DETERMINE` to have calculated if n is given)

- Ii - row indices; that is Ii[0] = 0, Ii[row] = Ii[row-1] + number of elements in that row of the matrix

- J - column indices

- v - matrix values

## See Also

Matrices, `Mat`, `MATMPIAIJ`, `MatCreate()`, `MatCreateSeqAIJ()`, `MatSetValues()`, `MatMPIAIJSetPreallocation()`, `MatMPIAIJSetPreallocationCSR()`, `MatCreateAIJ()`, `MatCreateMPIAIJWithSplitArrays()`, `MatUpdateMPIAIJWithArray()`, `MatSetPreallocationCOO()`, `MatSetValuesCOO()`

## Level

deprecated

## Location

src/mat/impls/aij/mpi/mpiaij.c

Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages