MatAXPY

Computes Y = a*X + Y.

Synopsis

#include "petscmat.h"  
PetscErrorCode MatAXPY(Mat Y, PetscScalar a, Mat X, MatStructure str)

Logically Collective

Input Parameters

• a - the scalar multiplier

• X - the first matrix

• Y - the second matrix

• str - either SAME_NONZERO_PATTERN, DIFFERENT_NONZERO_PATTERN, UNKNOWN_NONZERO_PATTERN, or SUBSET_NONZERO_PATTERN (nonzeros of X is a subset of Y’s)

Note

If Y MAT_STRUCTURE_ONLY option is set to true, only the union of the nonzero patterns is computed, without accessing numerical values. As with numerical matrices, a equal to zero leaves Y unchanged.

See Also

Matrices, Mat, MatAYPX()

Level

intermediate

Location

src/mat/utils/axpy.c

Examples

src/mat/tests/ex113.c
src/mat/tests/ex132.c
src/mat/tests/ex172.c
src/mat/tests/ex2.c
src/mat/tests/ex251.c
src/mat/tests/ex49.c
src/mat/impls/diagonal/tests/ex1.c
src/mat/tests/ex1.c
src/mat/tests/ex104.c
src/mat/tests/ex115.c

Implementations

MatAXPY_MPIAIJ() in src/mat/impls/aij/mpi/mpiaij.c
MatAXPY_SeqAIJ() in src/mat/impls/aij/seq/aij.c
MatAXPY_SeqAIJKokkos() in src/mat/impls/aij/seq/kokkos/aijkok.kokkos.cxx
MatAXPY_SeqAIJCUSPARSE() in src/mat/impls/aij/seq/seqcusparse/aijcusparse.cu
MatAXPY_SeqAIJHIPSPARSE() in src/mat/impls/aij/seq/seqhipsparse/aijhipsparse.hip.cxx
MatAXPY_MPIBAIJ() in src/mat/impls/baij/mpi/mpibaij.c
MatAXPY_SeqBAIJ() in src/mat/impls/baij/seq/baij.c
MatAXPY_SeqBAIJMKL() in src/mat/impls/baij/seq/baijmkl/baijmkl.c
MatAXPY_ConstantDiagonal() in src/mat/impls/cdiagonal/cdiagonal.c
MatAXPY_MPIDense() in src/mat/impls/dense/mpi/mpidense.c
MatAXPY_SeqDense() in src/mat/impls/dense/seq/dense.c
MatAXPY_Diagonal() in src/mat/impls/diagonal/diagonal.c
MatAXPY_Elemental() in src/mat/impls/elemental/matelem.cxx
MatAXPY_HYPRE() in src/mat/impls/hypre/mhypre.c
MatAXPY_IS() in src/mat/impls/is/matis.c
MatAXPY_Nest() in src/mat/impls/nest/matnest.c
MatAXPY_MPISBAIJ() in src/mat/impls/sbaij/mpi/mpisbaij.c
MatAXPY_SeqSBAIJ() in src/mat/impls/sbaij/seq/sbaij.c
MatAXPY_ScaLAPACK() in src/mat/impls/scalapack/matscalapack.c
MatAXPY_Shell() in src/mat/impls/shell/shell.c

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