Distribution.h

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// -*- C++ -*-

// Distribution.h
// 
// Copyright (C) *YEAR* *AUTHOR(S)* 
// ...
// Copyright (C) *YEAR* *AUTHOR(S)* 
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 
//  1. Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
// 
//  2. Redistributions in binary form must reproduce the above copyright
//     notice, this list of conditions and the following disclaimer in the
//     documentation and/or other materials provided with the distribution.
// 
//  3. The name of the authors may not be used to endorse or promote
//     products derived from this software without specific prior written
//     permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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// 
// This file is part of the PLearn library. For more information on the PLearn
// library, go to the PLearn Web site at www.plearn.org

/* *******************************************************      
   * $Id: Distribution.h,v 1.11 2004/07/21 16:30:55 chrish42 Exp $ 
   ******************************************************* */

#ifndef Distribution_INC
#define Distribution_INC

#include <plearn_learners/generic/Learner.h>

namespace PLearn {
using namespace std;

class Distribution: public Learner
{
protected:
  // *********************
  // * protected options *
  // *********************

  // ### declare protected option fields (such as learnt parameters) here
  // ...
    
public:

  typedef Learner inherited;

  // ************************
  // * public build options *
  // ************************

  string use_returns_what;

  // ****************
  // * Constructors *
  // ****************

  // Default constructor, make sure the implementation in the .cc
  // initializes all fields to reasonable default values.
  Distribution();


  // ******************
  // * Object methods *
  // ******************

private: 
  // (Please implement in .cc)
  void build_();

protected: 
  // (Please implement in .cc)
  static void declareOptions(OptionList& ol);

public:
  // simply calls inherited::build() then build_() 
  virtual void build();

  virtual void makeDeepCopyFromShallowCopy(map<const void*, void*>& copies);

  PLEARN_DECLARE_OBJECT(Distribution);

  // *******************
  // * Learner methods *
  // *******************

  virtual void train(VMat training_set); 

  virtual void use(const Vec& input, Vec& output);


  virtual double log_density(const Vec& x) const;

  virtual double density(const Vec& x) const;
  
  virtual double survival_fn(const Vec& x) const;

  virtual double cdf(const Vec& x) const;

  virtual Vec expectation() const;

  virtual Mat variance() const;

  virtual void generate(Vec& x) const;

};

// Declares a few other classes and functions related to this class
  DECLARE_OBJECT_PTR(Distribution);
  
} // end of namespace PLearn

#endif

---