data.h File Reference

Description

Methods for dealing with datasets.

This file contains methods for reading and writing data to disk, and for converting data between different formats.

Classes
class	stag::DataPoint
	A data point in d-dimensional space. More...

Functions
DenseMat	stag::load_matrix (std::string &filename)
void	stag::save_matrix (DenseMat &data, std::string &filename)
std::vector< stag::DataPoint >	stag::matrix_to_datapoints (DenseMat *data)

Function Documentation

load_matrix()

DenseMat stag::load_matrix

(

std::string &

filename

)

Load data into a matrix from a file.

Each line of the file corresponds to a row in the matrix. On each row, matrix entries should be separated by blank spaces, or commas. Every row in the file must contain the same number of entries.

Lines beginning with '#' or '//' are ignored.

Parameters

filename

the name of the file containing the data

Returns

a DenseMat containing the data from the file

Exceptions

std::runtime_error

if the file doesn't exist or cannot be parsed

save_matrix()

void stag::save_matrix	(	DenseMat &	data,
		std::string &	filename
	)

Save a data matrix to a text file.

Parameters

data	the matrix to be saved
filename	the name of the file to save the data to

Exceptions

std::runtime_error

if the file cannot be opened for writing

matrix_to_datapoints()

std::vector< stag::DataPoint > stag::matrix_to_datapoints

(

DenseMat *

data

)

Convert data in an eigen matrix to an array of data point pointers.

Parameters

data	the eigen matrix containing the data

Returns

a vector of stag::DataPoint pointing to the rows of the matrix