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
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD> <link rel="canonical" href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/DMPLEX/DMPlexPreallocateOperator.html" />
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<TITLE>DMPlexPreallocateOperator</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/DMPLEX/DMPlexPreallocateOperator.html "><small>Report Typos and Errors</small></a></div>
<A NAME="DMPlexPreallocateOperator"><H1>DMPlexPreallocateOperator</H1></A>
Calculate the matrix nonzero pattern based upon the information in the <A HREF="../DM/DM.html#DM">DM</A>, the <A HREF="../DM/PetscDS.html#PetscDS">PetscDS</A> it contains, and the default <A HREF="../IS/PetscSection.html#PetscSection">PetscSection</A>.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdmplex.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DMPLEX/DMPlexPreallocateOperator.html#DMPlexPreallocateOperator">DMPlexPreallocateOperator</A>(<A HREF="../DM/DM.html#DM">DM</A> dm, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> bs, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> dnz[], <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> onz[], <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> dnzu[], <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> onzu[], <A HREF="../Mat/Mat.html#Mat">Mat</A> A, <A HREF="../Sys/PetscBool.html#PetscBool">PetscBool</A> fillMatrix)
</PRE>
Collective
<P>
<H3><FONT COLOR="#CC3333">Input Arguments</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dm </B></TD><TD>- The DMPlex
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>bs </B></TD><TD>- The matrix blocksize
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dnz </B></TD><TD>- An array to hold the number of nonzeros in the diagonal block
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>onz </B></TD><TD>- An array to hold the number of nonzeros in the off-diagonal block
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dnzu </B></TD><TD>- An array to hold the number of nonzeros in the upper triangle of the diagonal block
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>onzu </B></TD><TD>- An array to hold the number of nonzeros in the upper triangle of the off-diagonal block
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fillMatrix </B></TD><TD>- If <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A>, fill the matrix with zeros
</TD></TR>
<P>
<H3><FONT COLOR="#CC3333">Ouput Argument</FONT></H3>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>A </B></TD><TD>- The preallocated matrix
</TD></TR>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMCreateMatrix.html#DMCreateMatrix">DMCreateMatrix</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/dm/impls/plex/plexpreallocate.c.html#DMPlexPreallocateOperator">src/dm/impls/plex/plexpreallocate.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/dm/impls/plex/plexpreallocate.c.html#DMPlexPreallocateOperator_2">DMPlexPreallocateOperator_2 in src/dm/impls/plex/plexpreallocate.c</A><BR>
<BR><A HREF="./index.html">Index of all DMPLEX 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>
|
