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//
// Created by martin on 14.11.18.
//
#include <string>
#include <fstream>
#include <sstream>
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namespace lib4neuro {
CSVReader::CSVReader(std::string file_path, std::string delimiter, bool ignore_first_line) {
this->file_path = file_path;
this->delimiter = delimiter;
this->ignore_first_line = ignore_first_line;
this->header_included = ignore_first_line;
this->data = new std::vector<std::vector<std::string>>;
}
void CSVReader::read() {
std::ifstream ifs(this->file_path);
std::string line;
if(this->ignore_first_line) {
std::getline(ifs, line);
}
/* Read single line from the file */
while(std::getline(ifs, line)) {
/* Ignore empty line */
if(line == "") {
continue;
}
/* Separate elements of the line according to the delimiter */
size_t last = 0;
size_t next = 0;
std::vector<std::string> separated_line;
while ((next = line.find(this->delimiter, last)) != std::string::npos) {
separated_line.emplace_back(line.substr(last, next - last));
last = next + 1;
}
separated_line.emplace_back(line.substr(last));
/* Store the elements from the line to the vector with data */
this->data->emplace_back(separated_line);
}
ifs.close();
}
std::vector<std::vector<std::string>>* CSVReader::get_data() {
return this->data;
}
void CSVReader::print_data() {
for(auto line : *this->data) {
for(auto e : line) {
std::cout << e << " ";
}
std::cout << std::endl;
}
}
DataSet CSVReader::get_data_set(std::vector<unsigned int>* input_col_indices,
std::vector<unsigned int>* output_col_indices) {
std::vector<std::pair<std::vector<double>, std::vector<double>>> data_set_contents;
int i = 0;
for(auto line : *this->data) {
std::cout << i++ << std::endl;
//TODO check for non-numerical (or empty) values in data
std::vector<double> input;
for(auto ind : *input_col_indices) {
input.push_back(std::stod(line.at(ind)));
}
std::cout << "a" << std::endl;
std::vector<double> output;
for(auto ind : *output_col_indices) {
output.emplace_back(std::stod(line.at(ind)));
}
std::cout << "b" << std::endl;
data_set_contents.push_back(std::make_pair(input, output));
}
int a = 1;
return DataSet(&data_set_contents);
}
}