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
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD> <link rel="canonical" href="http://slepc.upv.es/documentation/current/docs/manualpages/PEP/PEPGetScale.html" />
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<link rel="stylesheet" href="/slepc.css" type="text/css">
<TITLE>PEPGetScale</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<div id="version" align=right><b>slepc-3.7.3 2016-09-29</b></div>
<div id="bugreport" align=right><a href="mailto:slepc-maint@upv.es?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: slepc-3.7.3 v3.7.3 docs/manualpages/PEP/PEPGetScale.html "><small>Report Typos and Errors</small></a></div>
<H1>PEPGetScale</H1>
Gets the scaling strategy used by the <A HREF="../PEP/PEP.html#PEP">PEP</A> object, and the associated parameters.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcpep.h"
PetscErrorCode PEPGetScale(PEP pep,PEPScale *scale,PetscReal *alpha,Vec *Dl,Vec *Dr,PetscInt *its,PetscReal *lambda)
</PRE>
Not Collectiv, but vectors are shared by all processors that share the <A HREF="../PEP/PEP.html#PEP">PEP</A>
<P>
<H3><FONT COLOR="#883300">Input Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0"><TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>pep </B></TD><TD> - the eigensolver context
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Output Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>scale </B></TD><TD> - scaling strategy
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>alpha </B></TD><TD> - the scaling factor used in the scalar strategy
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>Dl </B></TD><TD> - the left diagonal matrix of the diagonal scaling algorithm
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>Dr </B></TD><TD> - the right diagonal matrix of the diagonal scaling algorithm
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>its </B></TD><TD> - number of iterations of the diagonal scaling algorithm
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>lambda </B></TD><TD> - approximation to wanted eigenvalues (modulus)
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#883300">Note</FONT></H3>
The user can specify NULL for any parameter that is not needed.
<P>
If Dl or Dr were not set by the user, then the ones computed internally are
returned (or a null pointer if called before <A HREF="../PEP/PEPSetUp.html#PEPSetUp">PEPSetUp</A>).
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../PEP/PEPSetScale.html#PEPSetScale">PEPSetScale</A>(), <A HREF="../PEP/PEPSetUp.html#PEPSetUp">PEPSetUp</A>()
<BR><P><B><FONT COLOR="#883300">Location: </FONT></B><A HREF="../../../src/pep/interface/pepopts.c.html#PEPGetScale">src/pep/interface/pepopts.c</A>
<BR><A HREF="./index.html">Index of all PEP 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>
|
