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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.10.3 v3.10.3 docs/manualpages/Mat/MatAXPY.html "><small>Report Typos and Errors</small></a></div>
<A NAME="MatAXPY"><H1>MatAXPY</H1></A>
Computes Y = a*X + Y.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatAXPY.html#MatAXPY">MatAXPY</A>(<A HREF="../Mat/Mat.html#Mat">Mat</A> Y,<A HREF="../Sys/PetscScalar.html#PetscScalar">PetscScalar</A> a,<A HREF="../Mat/Mat.html#Mat">Mat</A> X,<A HREF="../Mat/MatStructure.html#MatStructure">MatStructure</A> str)
</PRE>
Logically Collective on <A HREF="../Mat/Mat.html#Mat">Mat</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>a </B></TD><TD>- the scalar multiplier
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>X </B></TD><TD>- the first matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>Y </B></TD><TD>- the second matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>str </B></TD><TD>- either <A HREF="../Mat/MatStructure.html#MatStructure">SAME_NONZERO_PATTERN</A>, <A HREF="../Mat/MatStructure.html#MatStructure">DIFFERENT_NONZERO_PATTERN</A>
or <A HREF="../Mat/MatStructure.html#MatStructure">SUBSET_NONZERO_PATTERN</A> (nonzeros of X is a subset of Y's)
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
matrix, add
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatAYPX.html#MatAYPX">MatAYPX</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/mat/utils/axpy.c.html#MatAXPY">src/mat/utils/axpy.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex29.c.html">src/ksp/ksp/examples/tutorials/ex29.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex34.c.html">src/ksp/ksp/examples/tutorials/ex34.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex58.c.html">src/ksp/ksp/examples/tutorials/ex58.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex50.c.html">src/ts/examples/tutorials/ex50.c.html</A><BR>
<A HREF="../../../src/tao/unconstrained/examples/tutorials/spectraladjointassimilation.c.html">src/tao/unconstrained/examples/tutorials/spectraladjointassimilation.c.html</A><BR>
<A HREF="../../../src/tao/pde_constrained/examples/tutorials/hyperbolic.c.html">src/tao/pde_constrained/examples/tutorials/hyperbolic.c.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/mat/impls/aij/mpi/mpiaij.c.html#MatAXPY_MPIAIJ">MatAXPY_MPIAIJ in src/mat/impls/aij/mpi/mpiaij.c</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/aij.c.html#MatAXPY_SeqAIJ">MatAXPY_SeqAIJ in src/mat/impls/aij/seq/aij.c</A><BR>
<A HREF="../../../src/mat/impls/baij/mpi/mpibaij.c.html#MatAXPY_MPIBAIJ">MatAXPY_MPIBAIJ in src/mat/impls/baij/mpi/mpibaij.c</A><BR>
<A HREF="../../../src/mat/impls/baij/seq/baij.c.html#MatAXPY_SeqBAIJ">MatAXPY_SeqBAIJ in src/mat/impls/baij/seq/baij.c</A><BR>
<A HREF="../../../src/mat/impls/baij/seq/baijmkl/baijmkl.c.html#MatAXPY_SeqBAIJMKL">MatAXPY_SeqBAIJMKL in src/mat/impls/baij/seq/baijmkl/baijmkl.c</A><BR>
<A HREF="../../../src/mat/impls/dense/mpi/mpidense.c.html#MatAXPY_MPIDense">MatAXPY_MPIDense in src/mat/impls/dense/mpi/mpidense.c</A><BR>
<A HREF="../../../src/mat/impls/dense/seq/dense.c.html#MatAXPY_SeqDense">MatAXPY_SeqDense in src/mat/impls/dense/seq/dense.c</A><BR>
<A HREF="../../../src/mat/impls/elemental/matelem.cxx.html#MatAXPY_Elemental">MatAXPY_Elemental in src/mat/impls/elemental/matelem.cxx</A><BR>
<A HREF="../../../src/mat/impls/is/matis.c.html#MatAXPY_IS">MatAXPY_IS in src/mat/impls/is/matis.c</A><BR>
<A HREF="../../../src/mat/impls/sbaij/mpi/mpisbaij.c.html#MatAXPY_MPISBAIJ">MatAXPY_MPISBAIJ in src/mat/impls/sbaij/mpi/mpisbaij.c</A><BR>
<A HREF="../../../src/mat/impls/sbaij/seq/sbaij.c.html#MatAXPY_SeqSBAIJ">MatAXPY_SeqSBAIJ in src/mat/impls/sbaij/seq/sbaij.c</A><BR>
<A HREF="../../../src/mat/impls/shell/shell.c.html#MatAXPY_Shell">MatAXPY_Shell in src/mat/impls/shell/shell.c</A><BR>
<BR><A HREF="./index.html">Index of all Mat routines</A>
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