99 lines
3.4 KiB
C
99 lines
3.4 KiB
C
|
// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
|
||
|
|
// Copyright (C) 2010 Winch Gate Property Limited
|
||
|
|
//
|
||
|
|
// This program is free software: you can redistribute it and/or modify
|
||
|
|
// it under the terms of the GNU Affero General Public License as
|
||
|
|
// published by the Free Software Foundation, either version 3 of the
|
||
|
|
// License, or (at your option) any later version.
|
||
|
|
//
|
||
|
|
// This program is distributed in the hope that it will be useful,
|
||
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
// GNU Affero General Public License for more details.
|
||
|
|
//
|
||
|
|
// You should have received a copy of the GNU Affero General Public License
|
||
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
|
||
|
|
/* Copyright, 2000 Nevrax Ltd.
|
||
|
|
*
|
||
|
|
* This file is part of NEVRAX NEL.
|
||
|
|
* NEVRAX NEL is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
||
|
|
* any later version.
|
||
|
|
|
||
|
|
* NEVRAX NEL is distributed in the hope that it will be useful, but
|
||
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* General Public License for more details.
|
||
|
|
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with NEVRAX NEL; see the file COPYING. If not, write to the
|
||
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
|
||
|
|
* MA 02111-1307, USA.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef NL_TREE_H_
|
||
|
|
#define NL_TREE_H_
|
||
|
|
|
||
|
|
#include <vector>
|
||
|
|
#include <map>
|
||
|
|
#include "record.h"
|
||
|
|
#include "node.h"
|
||
|
|
#include "field.h"
|
||
|
|
|
||
|
|
|
||
|
|
class CTree
|
||
|
|
{
|
||
|
|
private:
|
||
|
|
//std::vector<std::string> _Fields;
|
||
|
|
int _Key;
|
||
|
|
INode *_RootNode;
|
||
|
|
|
||
|
|
public:
|
||
|
|
|
||
|
|
struct greater : public std::binary_function<std::pair<double,int> , std::pair<double,int> , bool> {
|
||
|
|
bool operator()(std::pair<double,int> x, std::pair<double,int> y) const
|
||
|
|
{
|
||
|
|
return x.first > y.first;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
public:
|
||
|
|
CTree();
|
||
|
|
~CTree();
|
||
|
|
void setKey(int);
|
||
|
|
int getKey();
|
||
|
|
|
||
|
|
bool getOutput(CRecord *);
|
||
|
|
|
||
|
|
int getNbRecords(std::vector<CRecord *> &,int,IValue *);
|
||
|
|
|
||
|
|
std::vector<CRecord *> getRecords(std::vector<CRecord *> &, int , bool);
|
||
|
|
|
||
|
|
void splitRecords(std::vector<CRecord *> &, int, int &, int &);
|
||
|
|
void splitRecords(std::vector<CRecord *> &, int, std::vector<CField *> &, std::vector< std::vector<CRecord *> > &);
|
||
|
|
|
||
|
|
void splitRecords(std::vector<CRecord *> &, int, IValue *, int &, int &);
|
||
|
|
void splitRecords(std::vector<CRecord *> &, int, IValue *, bool, int &, int &);
|
||
|
|
|
||
|
|
float findNumKeyValue(std::vector<CRecord *> &, int);
|
||
|
|
|
||
|
|
double log2(double) const;
|
||
|
|
|
||
|
|
double entropy(double, double) const;
|
||
|
|
double entropy(std::vector<double> &) const;
|
||
|
|
double gain(std::vector<CRecord *> &, int, CField *);
|
||
|
|
|
||
|
|
std::vector<std::pair<double,int> > getSortedFields(std::vector<int> &, std::vector<CRecord *> &, std::vector<CField *> &);
|
||
|
|
int getBestAttrib( std::vector<int> &, std::vector<CRecord *> &, std::vector<CField *> &);
|
||
|
|
void rebuild(std::vector<CRecord *> &, std::vector<CField *> &);
|
||
|
|
|
||
|
|
std::string getDebugString(std::vector<CRecord *> &, std::vector<CField *> &);
|
||
|
|
|
||
|
|
// returns the root node of a decision tree built with the ID3 algorithm
|
||
|
|
INode *ID3(std::vector<int> &, std::vector<CRecord *> &, std::vector<CField *> &);
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|