int main() {
int i = 0;
// file, delimiter, first_line_is_header?
CsvParser *csvparser = CsvParser_new("example_file_with_header.csv", ",", 1);
CsvRow *header;
CsvRow *row;
header = CsvParser_getHeader(csvparser);
if (header == NULL) {
printf("%s\n", CsvParser_getErrorMessage(csvparser));
return 1;
}
const char **headerFields = CsvParser_getFields(header);
for (i = 0 ; i < CsvParser_getNumFields(header) ; i++) {
printf("TITLE: %s\n", headerFields[i]);
}
// Do NOT destroy the headear manually if you plan to destroy the parser later.
// If you destroy both header and parser, you will get double free runtime error
// CsvParser_destroy_row(header);
while ((row = CsvParser_getRow(csvparser)) ) {
printf("==NEW LINE==\n");
const char **rowFields = CsvParser_getFields(row);
for (i = 0 ; i < CsvParser_getNumFields(row) ; i++) {
printf("FIELD: %s\n", rowFields[i]);
}
printf("\n");
CsvParser_destroy_row(row);
}
CsvParser_destroy(csvparser);
return 0;
}
void Trajectory::LoadMatrixFromCSV( const std::string& filename, Eigen::MatrixXd &matrix) {
cout << "Loading " << filename << endl;
int number_of_lines = GetNumberOfLines(filename);
int row_num = 0;
int i = 0;
// file, delimiter, first_line_is_header?
CsvParser *csvparser = CsvParser_new(filename.c_str(), ",", true);
CsvRow *header;
CsvRow *row;
header = CsvParser_getHeader(csvparser);
if (header == NULL) {
printf("%s\n", CsvParser_getErrorMessage(csvparser));
return;
}
char **headerFields = CsvParser_getFields(header);
for (i = 0 ; i < CsvParser_getNumFields(header) ; i++) {
//printf("TITLE: %s\n", headerFields[i]);
}
matrix.resize(number_of_lines - 1, i); // minus 1 for header, i = number of columns
while ((row = CsvParser_getRow(csvparser)) ) {
//printf("NEW LINE:\n");
char **rowFields = CsvParser_getFields(row);
for (i = 0 ; i < CsvParser_getNumFields(row) ; i++) {
matrix(row_num, i) = atof(rowFields[i]);
//printf("FIELD: %20.20f\n", atof(rowFields[i]));
}
CsvParser_destroy_row(row);
if (row_num == 1) {
dt_ = matrix(1, 0) - matrix(0, 0);
} else if (row_num > 1) {
if (matrix(row_num, 0) - matrix(row_num - 1, 0) - dt_ > 5*std::numeric_limits<double>::epsilon()) {
cerr << "Error: non-constant dt. Expected dt = " << dt_ << " but got matrix[" << row_num << "][0] - matrix[" << row_num - 1 << "][0] = " << matrix(row_num, 0) - matrix(row_num - 1, 0) << " (residual = " << (matrix(row_num, 0) - matrix(row_num - 1, 0) - dt_) << endl;
cout << matrix << endl;
exit(1);
}
}
row_num ++;
}
CsvParser_destroy(csvparser);
}
