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Review/Statistics/itkTDistribution.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkTDistribution.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-05-02 05:44:00 $
00007   Version:   $Revision: 1.1 $
00008 
00009   Copyright (c) Insight Software Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even 
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 #ifndef __itkTDistribution_h
00018 #define __itkTDistribution_h
00019 
00020 #include "itkProbabilityDistribution.h"
00021 #include "itkNumericTraits.h"
00022 
00023 namespace itk { 
00024 namespace Statistics {
00025 
00054 class ITK_EXPORT TDistribution :
00055     public ProbabilityDistribution
00056 {
00057 public:
00059   typedef TDistribution            Self;
00060   typedef ProbabilityDistribution  Superclass;
00061   typedef SmartPointer<Self>       Pointer;
00062   typedef SmartPointer<const Self> ConstPointer;
00063 
00065   itkTypeMacro(TDistribution, ProbabilityDistribution);
00066 
00068   itkNewMacro(Self);
00069 
00072   virtual unsigned long GetNumberOfParameters() const { return 1; }
00073 
00076   virtual double EvaluatePDF(double x) const;
00077 
00081   virtual double EvaluatePDF(double x, const ParametersType&) const;
00082 
00085   virtual double EvaluatePDF(double x, long degreesOfFreedom) const;
00086 
00089   virtual double EvaluateCDF(double x) const;
00090 
00094   virtual double EvaluateCDF(double x, const ParametersType&) const;
00095 
00098   virtual double EvaluateCDF(double x, long degreesOfFreedom) const;
00099 
00103   virtual double EvaluateInverseCDF(double p) const;
00104 
00109   virtual double EvaluateInverseCDF(double p, const ParametersType&) const;
00110 
00114   virtual double EvaluateInverseCDF(double p, long degreesOfFreedom) const;
00115 
00118   virtual void SetDegreesOfFreedom(long);
00119 
00122   virtual long GetDegreesOfFreedom() const;
00123 
00125   virtual bool HasMean() const { return true; }
00126 
00128   virtual double GetMean() const;
00129 
00132   virtual bool HasVariance() const;
00133 
00136   virtual double GetVariance() const;
00137 
00138 
00144   static double PDF(double x, const ParametersType&);
00145 
00150   static double PDF(double x, long degreesOfFreedom);
00151 
00161   static double CDF(double x, const ParametersType&);
00162 
00171   static double CDF(double x, long degreesOfFreedom);
00172 
00183   static double InverseCDF(double p, const ParametersType&);
00184 
00195   static double InverseCDF(double p, long degreesOfFreedom);
00196 
00197 protected:
00198   TDistribution(void);
00199   virtual ~TDistribution(void) {}
00200 
00201   void PrintSelf(std::ostream& os, Indent indent) const;
00202 
00203 private:
00204   TDistribution(const Self&); //purposely not implemented
00205   void operator=(const Self&); //purposely not implemented
00206   
00207 }; // end of class
00208 
00209 } // end of namespace Statistics
00210 } // end namespace itk
00211 
00212 #endif
00213 

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