1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD> <link rel="canonical" href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Mat/MatMatTransposeMult.html" />
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<TITLE>MatMatTransposeMult</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<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/MatMatTransposeMult.html "><small>Report Typos and Errors</small></a></div>
<A NAME="MatMatTransposeMult"><H1>MatMatTransposeMult</H1></A>
Performs Matrix-Matrix Multiplication C=A*B^T.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatMatTransposeMult.html#MatMatTransposeMult">MatMatTransposeMult</A>(<A HREF="../Mat/Mat.html#Mat">Mat</A> A,<A HREF="../Mat/Mat.html#Mat">Mat</A> B,<A HREF="../Mat/MatReuse.html#MatReuse">MatReuse</A> scall,<A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> fill,<A HREF="../Mat/Mat.html#Mat">Mat</A> *C)
</PRE>
Neighbor-wise 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 left matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>B </B></TD><TD>- the right matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>scall </B></TD><TD>- either <A HREF="../Mat/MatReuse.html#MatReuse">MAT_INITIAL_MATRIX</A> or <A HREF="../Mat/MatReuse.html#MatReuse">MAT_REUSE_MATRIX</A>
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fill </B></TD><TD>- expected fill as ratio of nnz(C)/(nnz(A) + nnz(B)), use <A HREF="../Sys/PETSC_DEFAULT.html#PETSC_DEFAULT">PETSC_DEFAULT</A> if not known
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<DT><B>C </B> -the product matrix
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
C will be created if <A HREF="../Mat/MatReuse.html#MatReuse">MAT_INITIAL_MATRIX</A> and must be destroyed by the user with <A HREF="../Mat/MatDestroy.html#MatDestroy">MatDestroy</A>().
<P>
<A HREF="../Mat/MatReuse.html#MatReuse">MAT_REUSE_MATRIX</A> can only be used if the matrices A and B have the same nonzero pattern as in the previous call
<P>
To determine the correct fill value, run with -info and search for the string "Fill ratio" to see the value
actually needed.
<P>
This routine is currently only implemented for pairs of SeqAIJ matrices and for the SeqDense class.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
MatMatTransposeMultSymbolic(), MatMatTransposeMultNumeric(), <A HREF="../Mat/MatMatMult.html#MatMatMult">MatMatMult</A>(), <A HREF="../Mat/MatTransposeMatMult.html#MatTransposeMatMult">MatTransposeMatMult</A>() <A HREF="../Mat/MatPtAP.html#MatPtAP">MatPtAP</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/interface/matrix.c.html#MatMatTransposeMult">src/mat/interface/matrix.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/mat/impls/aij/seq/matmatmult.c.html#MatMatTransposeMult_SeqAIJ_SeqAIJ">MatMatTransposeMult_SeqAIJ_SeqAIJ in src/mat/impls/aij/seq/matmatmult.c</A><BR>
<A HREF="../../../src/mat/impls/dense/seq/dense.c.html#MatMatTransposeMult_SeqDense_SeqDense">MatMatTransposeMult_SeqDense_SeqDense in src/mat/impls/dense/seq/dense.c</A><BR>
<A HREF="../../../src/mat/impls/elemental/matelem.cxx.html#MatMatTransposeMult_Elemental">MatMatTransposeMult_Elemental in src/mat/impls/elemental/matelem.cxx</A><BR>
<BR><A HREF="./index.html">Index of all Mat routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
</BODY></HTML>
|
