MinimizerVariableTransformation.h

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// @(#)root/mathmore:$Id$
// Author: L. Moneta 2009
 
// Header file for class MinimizerVariable
 
#ifndef ROOT_Math_MinimizerVariableTransformation
#define ROOT_Math_MinimizerVariableTransformation
 
namespace ROOT {
 
   namespace Math {
 
/**
   Base class for MinimizerVariable transformations defining the functions to deal
   with bounded parameters
 
   @ingroup MultiMin
*/
 
class MinimizerVariableTransformation {
 
public:
 
   virtual ~MinimizerVariableTransformation() {}
 
   virtual double Int2ext(double value, double lower, double upper) const = 0;
   virtual double Ext2int(double value, double lower, double upper) const = 0;
   virtual double DInt2Ext(double value, double lower, double upper) const = 0;
 
};
 
 
/**
   Sin Transformation class for dealing with double bounded variables
 
   @ingroup MultiMin
*/
class SinVariableTransformation : public MinimizerVariableTransformation {
 
public:
 
   virtual ~SinVariableTransformation() {}
 
   double Int2ext(double value, double lower, double upper) const;
   double Ext2int(double value, double lower, double upper) const;
   double DInt2Ext(double value, double lower, double upper) const;
 
private:
 
 
};
 
/**
   Sqrt Transformation class for dealing with lower bounded variables
 
   @ingroup MultiMin
*/
class SqrtLowVariableTransformation : public  MinimizerVariableTransformation {
public:
 
   virtual ~SqrtLowVariableTransformation() {}
 
   double Int2ext(double value, double lower, double upper) const;
   double Ext2int(double value, double lower, double upper) const;
   double DInt2Ext(double value, double lower, double upper) const;
 
};
 
/**
   Sqrt Transformation class for dealing with upper bounded variables
 
   @ingroup MultiMin
*/
class SqrtUpVariableTransformation : public  MinimizerVariableTransformation {
public:
 
   virtual ~SqrtUpVariableTransformation() {}
 
   double Int2ext(double value, double lower, double upper) const;
   double Ext2int(double value, double lower, double upper) const;
   double DInt2Ext(double value, double lower, double upper) const;
 
};
 
 
   } // end namespace Math
 
} // end namespace ROOT
 
 
#endif /* ROOT_Math_MinimizerVariableTransformation */