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/* This file is part of the Gudhi Library. The Gudhi library
* (Geometric Understanding in Higher Dimensions) is a generic C++
* library for computational topology.
*
* Author(s): Pawel Dlotko
*
* Copyright (C) 2016 Inria
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gudhi/Persistence_intervals.h>
#include <iostream>
#include <vector>
#include <limits>
#include <utility>
using Persistence_intervals = Gudhi::Persistence_representations::Persistence_intervals;
int main(int argc, char** argv) {
std::cout << "This program computes the range of birth and death times of persistence pairs in diagrams provided as "
<< "an input.\n"
<< "The first parameter is the dimension of persistence to be used to create persistence intervals. "
<< "If your file contains the information about dimension of persistence pairs, please provide here the "
<< "dimension of persistence pairs you want to use. "
<< "If your input files consist only of birth-death pairs, please set this first parameter to -1.\n"
<< "The remaining parameters of the program are the names of files with persistence diagrams.\n";
if (argc < 3) {
std::cout << "Wrong parameter list, the program will now terminate \n";
return 1;
}
unsigned dimension = std::numeric_limits<unsigned>::max();
int dim = atoi(argv[1]);
if (dim >= 0) {
dimension = (unsigned)dim;
}
std::vector<const char*> filenames;
for (int i = 2; i < argc; ++i) {
filenames.push_back(argv[i]);
}
double min_ = std::numeric_limits<double>::max();
double max_ = -std::numeric_limits<double>::max();
for (size_t file_no = 0; file_no != filenames.size(); ++file_no) {
std::cout << "Creating diagram based on a file : " << filenames[file_no] << std::endl;
Persistence_intervals p(filenames[file_no], dimension);
std::pair<double, double> min_max_ = p.get_x_range();
if (min_max_.first < min_) min_ = min_max_.first;
if (min_max_.second > max_) max_ = min_max_.second;
}
std::cout << "Birth-death range : min: " << min_ << ", max: " << max_ << std::endl;
return 0;
}
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