slepc-3.21.0 2024-03-30
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FNEvaluateDerivative

Computes the value of the derivative f'(x) for a given x.

Synopsis

#include "slepcfn.h" 
PetscErrorCode FNEvaluateDerivative(FN fn,PetscScalar x,PetscScalar *y)
Not Collective

Input Parameters

fn  - the math function context
x  - the value where the derivative must be evaluated

Output Parameter

y  - the result of f'(x)

Note

Scaling factors are taken into account, so the actual derivative evaluation will return alpha*beta*f'(alpha*x).

See Also

FNEvaluateFunction()

Level

intermediate

Location

src/sys/classes/fn/interface/fnbasic.c

Index of all FN routines
Table of Contents for all manual pages
Index of all manual pages