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<A NAME="DMSetFunction"><H1>DMSetFunction</H1></A>
sets a function to compute the right hand side vector entries for the <A HREF="../KSP/KSP.html#KSP">KSP</A> solver or nonlinear function for <A HREF="../SNES/SNES.html#SNES">SNES</A>
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdm.h"
PetscErrorCode DMSetFunction(DM dm,PetscErrorCode (*f)(DM,Vec,Vec))
</PRE>
Logically Collective on DM
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</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 DM object
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>f </B></TD><TD>- the function to compute (use <A HREF="../Sys/PETSC_NULL.html#PETSC_NULL">PETSC_NULL</A> to cancel a previous function that was set)
</TD></TR></TABLE>
<P>
<P>
Notes: This sets both the function for function evaluations and the function used to compute Jacobians via finite differences if no Jacobian
computer is provided with <A HREF="../DM/DMSetJacobian.html#DMSetJacobian">DMSetJacobian</A>(). Canceling cancels the function, but not the function used to compute the Jacobian.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMView.html#DMView">DMView</A>(), <A HREF="../DM/DMCreateGlobalVector.html#DMCreateGlobalVector">DMCreateGlobalVector</A>(), <A HREF="../DM/DMGetInterpolation.html#DMGetInterpolation">DMGetInterpolation</A>(), <A HREF="../DM/DMGetColoring.html#DMGetColoring">DMGetColoring</A>(), <A HREF="../DM/DMGetMatrix.html#DMGetMatrix">DMGetMatrix</A>(), <A HREF="../DM/DMGetApplicationContext.html#DMGetApplicationContext">DMGetApplicationContext</A>(), <A HREF="../DM/DMSetInitialGuess.html#DMSetInitialGuess">DMSetInitialGuess</A>(),
<BR><A HREF="../DM/DMSetJacobian.html#DMSetJacobian">DMSetJacobian</A>()
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/dm/interface/dm.c.html#DMSetFunction">src/dm/interface/dm.c</A>
<BR><A HREF="./index.html">Index of all DM 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>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex45.c.html">src/ksp/ksp/examples/tutorials/ex45.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex45f.F.html">src/ksp/ksp/examples/tutorials/ex45f.F.html</A><BR>
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