<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 2012 (1.2) original version by: Nikos Drakos, CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> <HTML> <HEAD> <TITLE>Subroutine mld_precinit</TITLE> <META NAME="description" CONTENT="Subroutine mld_precinit"> <META NAME="keywords" CONTENT="userhtml"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META NAME="Generator" CONTENT="LaTeX2HTML v2012"> <META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"> <LINK REL="STYLESHEET" HREF="userhtml.css"> <LINK REL="next" HREF="node18.html"> <LINK REL="previous" HREF="node16.html"> <LINK REL="up" HREF="node16.html"> <LINK REL="next" HREF="node18.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html280" HREF="node18.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html276" HREF="node16.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html270" HREF="node16.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html278" HREF="node2.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html281" HREF="node18.html">Subroutine mld_precset</A> <B> Up:</B> <A NAME="tex2html277" HREF="node16.html">User Interface</A> <B> Previous:</B> <A NAME="tex2html271" HREF="node16.html">User Interface</A> <B> <A NAME="tex2html279" HREF="node2.html">Contents</A></B> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION00081000000000000000"></A><A NAME="sec:precinit"></A> <BR> Subroutine mld_precinit </H2> <P> <DIV ALIGN="CENTER"> <code>mld_precinit(p,ptype,info)</code> <BR><code>mld_precinit(p,ptype,info,nlev)</code> <BR> </DIV> <P> This routine allocates and initializes the preconditioner data structure, according to the preconditioner type chosen by the user. <P> <FONT SIZE="+1"><B>Arguments</B></FONT> <P> <TABLE CELLPADDING=3> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34><code>p</code></TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340><code>type(mld_</code><I>x</I><code>prec_type), intent(inout)</code>.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34> </TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340>The preconditioner data structure. Note that <I>x</I> must be chosen according to the real/complex, single/double precision version of MLD2P4 under use.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34><code>ptype</code></TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340><code>character(len=*), intent(in)</code>.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34> </TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340>The type of preconditioner. Its values are specified in Table <A HREF="#tab:precinit">1</A>.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34> </TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340>Note that the strings are case insensitive.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34><code>info</code></TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340><code>integer, intent(out)</code>.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34> </TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340>Error code. If no error, 0 is returned. See Section <A HREF="node25.html#sec:errors">7</A> for details.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34><code>nlev</code></TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340><code>integer, optional, intent(in)</code>.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34> </TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340>The number of levels of the multilevel preconditioner. This optional argument is deprecated, new codes should set the number of levels with <code>mld_precset</code>.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34></TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340> </TD> </TR> </TABLE> <P> <P> <HR> <!--Navigation Panel--> <A NAME="tex2html280" HREF="node18.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html276" HREF="node16.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html270" HREF="node16.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html278" HREF="node2.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html281" HREF="node18.html">Subroutine mld_precset</A> <B> Up:</B> <A NAME="tex2html277" HREF="node16.html">User Interface</A> <B> Previous:</B> <A NAME="tex2html271" HREF="node16.html">User Interface</A> <B> <A NAME="tex2html279" HREF="node2.html">Contents</A></B> <!--End of Navigation Panel--> </BODY> </HTML>