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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="TSSetSolutionFunction"><H1>TSSetSolutionFunction</H1></A>
Provide a function that computes the solution of the ODE or DAE
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscts.h"
PetscErrorCode TSSetSolutionFunction(TS ts,PetscErrorCode (*f)(TS,PetscReal,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>f </B></TD><TD>- routine for evaluating the solution
</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,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>- output 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>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
This routine is used for testing accuracy of time integration schemes when you already know the solution.
If analytic solutions are not known for your system, consider using the Method of Manufactured Solutions to
create closed-form solutions with non-physical forcing terms.
<P>
For low-dimensional problems solved in serial, such as small discrete systems, <A HREF="../TS/TSMonitorLGError.html#TSMonitorLGError">TSMonitorLGError</A>() can be used to monitor the error history.
<P>
<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/TSComputeSolutionFunction.html#TSComputeSolutionFunction">TSComputeSolutionFunction</A>(), <A HREF="../TS/TSSetForcingFunction.html#TSSetForcingFunction">TSSetForcingFunction</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#TSSetSolutionFunction">src/ts/interface/ts.c</A>
<BR><A HREF="./index.html">Index of all TS routines</A>
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