slepc-3.17.1 2022-04-11
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Computes the value of the function f(x) for a given x.


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

Input Parameters

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

Output Parameter

y  - the result of f(x)


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

See Also

FNEvaluateDerivative(), FNEvaluateFunctionMat(), FNSetScale()

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