slepc-3.19.2 2023-09-05
   
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
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