69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
#ifndef XGBOOST_FMAP_H
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#define XGBOOST_FMAP_H
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/*!
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* \file xgboost_fmap.h
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* \brief helper class that holds the feature names and interpretations
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* \author Tianqi Chen: tianqi.tchen@gmail.com
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*/
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#include <vector>
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#include <string>
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#include <cstring>
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#include "xgboost_utils.h"
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namespace xgboost{
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namespace utils{
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/*! \brief helper class that holds the feature names and interpretations */
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class FeatMap{
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public:
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enum Type{
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kIndicator = 0,
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kQuantitive = 1
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};
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public:
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/*! \brief load feature map from text format */
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inline void LoadText( const char *fname ){
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FILE *fi = utils::FopenCheck( fname, "r" );
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this->LoadText( fi );
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fclose( fi );
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}
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/*! \brief load feature map from text format */
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inline void LoadText( FILE *fi ){
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int fid;
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char fname[256], ftype[256];
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while( fscanf( fi, "%d%s%s", &fid, fname, ftype ) == 3 ){
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utils::Assert( fid == (int)names_.size(), "invalid fmap format" );
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names_.push_back( std::string(fname) );
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types_.push_back( GetType( ftype ) );
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}
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}
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/*! \brief number of known features */
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size_t size( void ) const{
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return names_.size();
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}
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/*! \brief return name of specific feature */
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const char* name( size_t idx ) const{
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utils::Assert( idx < names_.size(), "utils::FMap::name feature index exceed bound" );
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return names_[ idx ].c_str();
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}
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/*! \brief return type of specific feature */
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const Type& type( size_t idx ) const{
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utils::Assert( idx < names_.size(), "utils::FMap::name feature index exceed bound" );
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return types_[ idx ];
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}
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private:
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inline static Type GetType( const char *tname ){
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if( !strcmp( "i", tname ) ) return kIndicator;
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if( !strcmp( "q", tname ) ) return kQuantitive;
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utils::Error("unknown feature type, use i for indicator and q for quantity");
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return kIndicator;
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}
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private:
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/*! \brief name of the feature */
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std::vector<std::string> names_;
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/*! \brief type of the feature */
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std::vector<Type> types_;
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};
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}; // namespace utils
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}; // namespace xgboost
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#endif // XGBOOST_FMAP_H
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