Data

t_mep_data(void);

~t_mep_data();

// returns the number of rows training data
int get_num_rows(void);

// returns the number of columns of the training data
int get_num_cols(void);

// returns the data type of the data:
// 0 for real
// 1 for string
int get_data_type(void);

int get_num_outputs(void);

void set_num_outputs(int new_num);

// returns a training data as double (if data type is 0)
// assumes that row and col are valid; no test for out of range are performed
double** get_data_matrix_double(void);

// returns a training data as string (if data type is 1)
// assumes that row and col are valid; no test for out of range are performed
char*** get_data_matrix_string(void);

// returns an entire row as a pointer to double
// data type must be 0,
double* get_row(int row);

double get_value_double(int row, int col);

char* get_value_string(int row, int col);

// clears the training data internal structures
void clear_data(void);

void delete_data(void);

// init data
void init(void);

int from_xml(pugi::xml_node parent);

int to_xml(pugi::xml_node parent);

// saves the training data to a csv files
bool to_csv(const char *file_name, char ListSeparator);

// loads the data from a csv file
bool from_csv(const char *filename);

// transform string values to real values
void to_numeric(void);

// scale to interval in the entire matrix
int to_interval_everywhere(double min, double max);

// scale to interval in all variables
int to_interval_all_variables(double min, double max);

// scale to interval in the selected column
int to_interval_selected_col(double min, double max, int col);

// replace a given string with another string; returns the number of replacements
int replace_symbol_from_selected_col(const char *find_what, const char* replace_with, int col, bool use_regular);
int replace_symbol_from_all_variables(const char *find_what, const char* replace_with, bool use_regular);
int replace_symbol_everywhere(const char *s_find_what, const char* s_replace_with, bool use_regular);

// returns the number of occurences of a given string
int find_symbol_from_selected_col(const char *find_what, int col, bool use_regular);
int find_symbol_from_all_variables(const char *find_what, bool use_regular);
int find_symbol_everywhere(const char *s_find_what, bool use_regular);

// randomly changes the rows of the data
void shuffle(void);

bool detect_list_separator(const char *file_name);

// moves last count rows to another t_mep_data object
int move_to(t_mep_data *, int count);

// computes how many row belong to the first class
void count_0_class(int target_col);

// returns true if the problem is a classification problem
bool is_classification_problem(void);

// returns true if data have been modified
bool is_modified(void);

// returns the number of items belonging to class 0
int get_num_items_class_0(void);