khanat-code-old/code/ryzom/tools/assoc_mem/tree.h
2014-02-07 19:29:36 -08:00

79 lines
2.5 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/>.
#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