Index

NAME

BellFunc  -  functor  (derived  from FieldsFunc) for the identity
mapping

INCLUDE

include "FieldFunc.h"

SYNTAX

 class BellFunc : public FieldFunc
 {
   VecSimple(real) prms;
 public:
   BellFunc ();
   BellFunc (const VecSimple(real)& parameters);
   void setParameters (const VecSimple(real)& parameters);

   virtual NUMT operator () (const Ptv(real)& x, real t) const
     { return CAST_CONST_AWAY(BellFunc)->valuePt(x,t); }
   virtual NUMT valuePt (const Ptv(real)& x, real t = DUMMY);
 };

KEYWORDS

Gaussian function, bell function

DESCRIPTION

The class is a predefined functor for the Gaussian bell function.
The  parameters reflect the position (the d first values) and the
width (the next d values, where d is the number of  space  dimen­
sions);  It  is convenient to read the parameters and the functor
name using FieldFormat (the data member function_prm can  be  fed
directly into the this functor).

CONSTRUCTORS AND INITIALIZATION

There are two ways to initialize a BellFunc object: 1) call Bell­
Func(prms), where prms is a vector of  parameters,  or  2)  first
declare  an  empty object using the constructor without arguments
and then call setParameters(prms).  Thereafter one  can  evaluate
the function using operator() or valuePt.

MEMBER FUNCTIONS

See class FieldFunc.

SEE ALSO

Class FieldFunc, class FieldFormat.

DEVELOPED BY

SINTEF Applied Mathematics, Oslo, Norway, and University of Oslo,
Dept. of Mathematics, Norway

AUTHOR

Hans Petter Langtangen, SINTEF/UiO