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<div id="version" align=right><b>slepc-3.7.3 2016-09-29</b></div>
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<H1>EPSComputeError</H1>
Computes the error (based on the residual norm) associated with the i-th computed eigenpair.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepceps.h"
PetscErrorCode EPSComputeError(EPS eps,PetscInt i,EPSErrorType type,PetscReal *error)
</PRE>
Collective on <A HREF="../EPS/EPS.html#EPS">EPS</A>
<P>
<H3><FONT COLOR="#883300">Input Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>eps </B></TD><TD> - the eigensolver context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>i </B></TD><TD> - the solution index
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>type </B></TD><TD> - the type of error to compute
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0"><TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>error </B></TD><TD> - the error
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
The error can be computed in various ways, all of them based on the residual
norm ||Ax-kBx||_2 where k is the eigenvalue and x is the eigenvector.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../EPS/EPSErrorType.html#EPSErrorType">EPSErrorType</A>, <A HREF="../EPS/EPSSolve.html#EPSSolve">EPSSolve</A>(), <A HREF="../EPS/EPSGetErrorEstimate.html#EPSGetErrorEstimate">EPSGetErrorEstimate</A>()
<BR><P><B><FONT COLOR="#883300">Location: </FONT></B><A HREF="../../../src/eps/interface/epssolve.c.html#EPSComputeError">src/eps/interface/epssolve.c</A>
<BR><A HREF="./index.html">Index of all EPS 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="#883300">Examples</FONT></H3>
<A HREF="../../../src/eps/examples/tutorials/ex1.c.html">src/eps/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/eps/examples/tutorials/ex19.c.html">src/eps/examples/tutorials/ex19.c.html</A><BR>
<A HREF="../../../src/eps/examples/tutorials/ex31.c.html">src/eps/examples/tutorials/ex31.c.html</A><BR>
<A HREF="../../../src/eps/examples/tutorials/ex1f.F.html">src/eps/examples/tutorials/ex1f.F.html</A><BR>
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