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