LightGBM::Parser Class Reference

Interface for Parser. More...

#include <dataset.h>

Inheritance diagram for LightGBM::Parser:

Public Member Functions
virtual	~Parser ()
	virtual destructor
virtual void	ParseOneLine (const char *str, std::vector< std::pair< int, double > > *out_features, double *out_label) const =0
	Parse one line with label.
virtual int	TotalColumns () const =0

Static Public Member Functions
static Parser *	CreateParser (const char *filename, bool header, int num_features, int label_idx)
	Create a object of parser, will auto choose the format depend on file.

Detailed Description

Interface for Parser.

Member Function Documentation

CreateParser()

Parser * LightGBM::Parser::CreateParser ( const char *  filename, bool  header, int  num_features, int  label_idx  )

static

Create a object of parser, will auto choose the format depend on file.

Parameters

filename	One Filename of data
num_features	Pass num_features of this data file if you know, <=0 means don't know
label_idx	index of label column

Returns

Object of parser

ParseOneLine()

virtual void LightGBM::Parser::ParseOneLine ( const char *  str, std::vector< std::pair< int, double > > *  out_features, double *  out_label  ) const

pure virtual

Parse one line with label.

Parameters

str	One line record, string format, should end with '\0'
out_features	Output columns, store in (column_idx, values)
out_label	Label will store to this if exists

Implemented in LightGBM::CSVParser, LightGBM::TSVParser, and LightGBM::LibSVMParser.

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The documentation for this class was generated from the following files:

• External/LightGBM_2.2.3/LightGBM-2.2.3/include/LightGBM/dataset.h
• External/LightGBM_2.2.3/LightGBM-2.2.3/src/io/parser.cpp