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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
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<A NAME="DMDASetRefinementFactor"><H1>DMDASetRefinementFactor</H1></A>
Set the ratios that the <A HREF="../DMDA/DMDA.html#DMDA">DMDA</A> grid is refined
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdmda.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DMDA/DMDASetRefinementFactor.html#DMDASetRefinementFactor">DMDASetRefinementFactor</A>(<A HREF="../DM/DM.html#DM">DM</A> da, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> refine_x, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> refine_y,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> refine_z)
</PRE>
Logically Collective on da
<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>da </B></TD><TD>- the <A HREF="../DMDA/DMDA.html#DMDA">DMDA</A> object
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>refine_x </B></TD><TD>- ratio of fine grid to coarse in x direction (2 by default)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>refine_y </B></TD><TD>- ratio of fine grid to coarse in y direction (2 by default)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>refine_z </B></TD><TD>- ratio of fine grid to coarse in z direction (2 by default)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-da_refine_x refine_x </B></TD><TD>- refinement ratio in x direction
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-da_refine_y rafine_y </B></TD><TD>- refinement ratio in y direction
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-da_refine_z refine_z </B></TD><TD>- refinement ratio in z direction
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-da_refine <n> </B></TD><TD>- refine the <A HREF="../DMDA/DMDA.html#DMDA">DMDA</A> object n times when it is created.
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Pass <A HREF="../Sys/PETSC_IGNORE.html#PETSC_IGNORE">PETSC_IGNORE</A> to leave a value unchanged
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMRefine.html#DMRefine">DMRefine</A>(), <A HREF="../DMDA/DMDAGetRefinementFactor.html#DMDAGetRefinementFactor">DMDAGetRefinementFactor</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/dm/impls/da/da.c.html#DMDASetRefinementFactor">src/dm/impls/da/da.c</A>
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