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GenericFunctions/LogisticFunction.hh
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// -*- C++ -*-
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// $Id:
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//---------------------Gaussian---------------------------------------------//
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// //
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// Class LogisticFunction //
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// Joe Boudreau, November 2002 //
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// //
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//--------------------------------------------------------------------------//
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#ifndef LogisticFunction_h
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#define LogisticFunction_h 1
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#include "
CLHEP/GenericFunctions/AbsFunction.hh
"
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#include "
CLHEP/GenericFunctions/Parameter.hh
"
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#include <vector>
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namespace
Genfun {
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class
LogisticFunction :
public
AbsFunction {
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FUNCTION_OBJECT_DEF
(
LogisticFunction
)
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public:
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// Constructor
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LogisticFunction
();
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// Copy constructor
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LogisticFunction(const LogisticFunction &right);
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// Destructor
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virtual ~LogisticFunction();
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// Retreive function value
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virtual
double
operator ()(
double
argument) const;
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virtual
double
operator ()(const
Argument
& arg)
const
{
return
operator()
(arg[0]);}
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// Get the starting value of the LogisticFunction
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Parameter
&
x0
();
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const
Parameter
&
x0
()
const
;
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// Get the control parameter of the LogisticFunction
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Parameter
&
a
();
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const
Parameter
&
a
()
const
;
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private
:
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// It is illegal to assign an adjustable constant
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const
LogisticFunction
& operator=(
const
LogisticFunction
&right);
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// Here is the decay constant
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Parameter
_x0;
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// Here is the sigma
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Parameter
_a;
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// A vector of values.
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mutable
std::vector<double> fx;
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// Some cache:
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mutable
double
__a, __x0;
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};
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}
// namespace Genfun
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#endif
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