diff options
Diffstat (limited to 'src/common/include/gudhi/reader_utils.h')
-rw-r--r-- | src/common/include/gudhi/reader_utils.h | 112 |
1 files changed, 111 insertions, 1 deletions
diff --git a/src/common/include/gudhi/reader_utils.h b/src/common/include/gudhi/reader_utils.h index 97a87edd..7b371afc 100644 --- a/src/common/include/gudhi/reader_utils.h +++ b/src/common/include/gudhi/reader_utils.h @@ -2,7 +2,7 @@ * (Geometric Understanding in Higher Dimensions) is a generic C++ * library for computational topology. * - * Author(s): Clement Maria, Pawel Dlotko + * Author(s): Clement Maria, Pawel Dlotko, Clement Jamin * * Copyright (C) 2014 INRIA * @@ -295,4 +295,114 @@ std::vector< std::vector< Filtration_value > > read_lower_triangular_matrix_from return result; } // read_lower_triangular_matrix_from_csv_file +/** +Reads a file containing persistance intervals. +Each line might contain 2, 3 or 4 values: [field] [dimension] birth death +The output iterator `out` is used this way: `*out++ = std::make_tuple(dim, birth, death);` +where `dim` is an `int`, `birth` a `double`, and `death` a `double`. +**/ +template <typename OutputIterator> +void read_persistence_diagram_from_file(std::string const& filename, OutputIterator out) { + + std::ifstream in; + in.open(filename); + if (!in.is_open()) { +#ifdef DEBUG_TRACES + std::cerr << "File \"" << filename << "\" does not exist.\n"; +#endif // DEBUG_TRACES + return; + } + + while (!in.eof()) { + std::string line; + getline(in, line); + if (line.length() != 0 && line[0] != '#') { + double numbers[4]; + int n = sscanf(line.c_str(), "%lf %lf %lf %lf", &numbers[0], &numbers[1], &numbers[2], &numbers[3]); + if (n >= 2) { + //int field = (n == 4 ? static_cast<int>(numbers[0]) : -1); + int dim = (n >= 3 ? static_cast<int>(numbers[n - 3]) : -1); + *out++ = std::make_tuple(dim, numbers[n - 2], numbers[n - 1]); + } + } + } + + in.close(); +} // read_persistence_diagram_from_file + +/** +Reads a file containing persistance intervals. +Each line might contain 2, 3 or 4 values: [field] [dimension] birth death +The return value is an `std::map[dim, std::vector[std::pair[birth, death]]]` +where `dim` is an `int`, `birth` a `double`, and `death` a `double`. +**/ +std::map<int, std::vector<std::pair<double, double>>> read_persistence_diagram_from_file(std::string const& filename) { + + std::map<int, std::vector<std::pair<double, double>>> ret; + + std::ifstream in; + in.open(filename); + if (!in.is_open()) { +#ifdef DEBUG_TRACES + std::cerr << "File \"" << filename << "\" does not exist.\n"; +#endif // DEBUG_TRACES + return ret; + } + + while (!in.eof()) { + std::string line; + getline(in, line); + if (line.length() != 0 && line[0] != '#') { + double numbers[4]; + int n = sscanf(line.c_str(), "%lf %lf %lf %lf", &numbers[0], &numbers[1], &numbers[2], &numbers[3]); + if (n >= 2) { + int dim = (n >= 3 ? static_cast<int>(numbers[n - 3]) : -1); + ret[dim].push_back(std::make_pair(numbers[n - 2], numbers[n - 1])); + } + } + } + + in.close(); + return ret; +} // read_persistence_diagram_from_file + + +/** +Reads a file containing persistance intervals. +Each line might contain 2, 3 or 4 values: [field] [dimension] birth death +If `only_this_dim` = -1, dimension is ignored and all lines are returned. +If `only_this_dim` is >= 0, only the lines where dimension = `only_this_dim` +(or where dimension is not specified) are returned. +The return value is an `std::vector[std::pair[birth, death]]` +where `dim` is an `int`, `birth` a `double`, and `death` a `double`. +**/ +std::vector<std::pair<double, double>> read_persistence_diagram_from_file(std::string const& filename, int only_this_dim) { + + std::vector<std::pair<double, double>> ret; + + std::ifstream in; + in.open(filename); + if (!in.is_open()) { +#ifdef DEBUG_TRACES + std::cerr << "File \"" << filename << "\" does not exist.\n"; +#endif // DEBUG_TRACES + return ret; + } + + while (!in.eof()) { + std::string line; + getline(in, line); + if (line.length() != 0 && line[0] != '#') { + double numbers[4]; + int n = sscanf(line.c_str(), "%lf %lf %lf %lf", &numbers[0], &numbers[1], &numbers[2], &numbers[3]); + int dim = (n >= 3 ? static_cast<int>(numbers[n - 3]) : -1); + if (n >= 2 && (only_this_dim == -1 || dim == only_this_dim)) + ret.push_back(std::make_pair(numbers[n - 2], numbers[n - 1])); + } + } + + in.close(); + return ret; +} // read_persistence_diagram_from_file + #endif // READER_UTILS_H_ |