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<H1>FNEvaluateDerivative</H1>
Computes the value of the derivative f'(x) for a given x.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcfn.h"
PetscErrorCode FNEvaluateDerivative(FN fn,PetscScalar x,PetscScalar *y)
</PRE>
Logically Collective on <A HREF="../FN/FN.html#FN">FN</A>
<P>
<H3><FONT COLOR="#883300">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fn </B></TD><TD> - the math function context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>x </B></TD><TD> - the value where the derivative must be evaluated
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Output Parameter</FONT></H3>
<DT><B>y </B> - the result of f'(x)
<br>
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../FN/FNEvaluateFunction.html#FNEvaluateFunction">FNEvaluateFunction</A>()
<BR><P><B><FONT COLOR="#883300">Location: </FONT></B><A HREF="../../../src/fn/fnbasic.c.html#FNEvaluateDerivative">src/fn/fnbasic.c</A>
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