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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</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-3.7.5 v3.7.5 docs/manualpages/TS/TSSetRHSFunction.html "><small>Report Typos and Errors</small></a></div>
<A NAME="TSSetRHSFunction"><H1>TSSetRHSFunction</H1></A>
Sets the routine for evaluating the function, where U_t = G(t,u).
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscts.h"
PetscErrorCode TSSetRHSFunction(TS ts,Vec r,PetscErrorCode (*f)(TS,PetscReal,Vec,Vec,void*),void *ctx)
</PRE>
Logically Collective on <A HREF="../TS/TS.html#TS">TS</A>
<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>ts </B></TD><TD>- the <A HREF="../TS/TS.html#TS">TS</A> context obtained from <A HREF="../TS/TSCreate.html#TSCreate">TSCreate</A>()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>r </B></TD><TD>- vector to put the computed right hand side (or NULL to have it created)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>f </B></TD><TD>- routine for evaluating the right-hand-side function
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ctx </B></TD><TD>- [optional] user-defined context for private data for the
function evaluation routine (may be NULL)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Calling sequence of func</FONT></H3>
<pre>
func (<A HREF="../TS/TS.html#TS">TS</A> ts,<A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> t,<A HREF="../Vec/Vec.html#Vec">Vec</A> u,<A HREF="../Vec/Vec.html#Vec">Vec</A> F,void *ctx);
</pre>
<P>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>t </B></TD><TD>- current timestep
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>u </B></TD><TD>- input vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>F </B></TD><TD>- function vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ctx </B></TD><TD>- [optional] user-defined function context
</TD></TR></TABLE>
<P>
<P>
Notes: You must call this function or <A HREF="../TS/TSSetIFunction.html#TSSetIFunction">TSSetIFunction</A>() to define your ODE. You cannot use this function when solving a DAE.
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../TS/TS.html#TS">TS</A>, timestep, set, right-hand-side, function
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../TS/TSSetRHSJacobian.html#TSSetRHSJacobian">TSSetRHSJacobian</A>(), <A HREF="../TS/TSSetIJacobian.html#TSSetIJacobian">TSSetIJacobian</A>(), <A HREF="../TS/TSSetIFunction.html#TSSetIFunction">TSSetIFunction</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>beginner
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ts/interface/ts.c.html#TSSetRHSFunction">src/ts/interface/ts.c</A>
<BR><A HREF="./index.html">Index of all TS 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/ts/examples/tutorials/ex1.c.html">src/ts/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex2.c.html">src/ts/examples/tutorials/ex2.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex3.c.html">src/ts/examples/tutorials/ex3.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex4.c.html">src/ts/examples/tutorials/ex4.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex5.c.html">src/ts/examples/tutorials/ex5.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex6.c.html">src/ts/examples/tutorials/ex6.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex7.c.html">src/ts/examples/tutorials/ex7.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex9.c.html">src/ts/examples/tutorials/ex9.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex12.c.html">src/ts/examples/tutorials/ex12.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex13.c.html">src/ts/examples/tutorials/ex13.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex16.c.html">src/ts/examples/tutorials/ex16.c.html</A><BR>
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