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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.
*
* Authors: Francois Godi, small modifications by Pawel Dlotko
*
* Copyright (C) 2015 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/Bottleneck.h>
#include <gudhi/reader_utils.h>
#include <iostream>
#include <vector>
#include <utility> // for pair
#include <string>
#include <limits> // for numeric_limits
int main(int argc, char** argv) {
if (argc < 3) {
std::cout << "To run this program please provide as an input two files with persistence diagrams. Each file" <<
" should contain a birth-death pair per line. Third, optional parameter is an error bound on the bottleneck" <<
" distance (set by default to the smallest positive double value). If you set the error bound to 0, be" <<
" aware this version is exact but expensive. The program will now terminate \n";
return -1;
}
std::vector<std::pair<double, double>> diag1 = Gudhi::read_persistence_intervals_in_dimension(argv[1]);
std::vector<std::pair<double, double>> diag2 = Gudhi::read_persistence_intervals_in_dimension(argv[2]);
double tolerance = std::numeric_limits<double>::min();
if (argc == 4) {
tolerance = atof(argv[3]);
}
double b = Gudhi::persistence_diagram::bottleneck_distance(diag1, diag2, tolerance);
std::cout << "The distance between the diagrams is : " << b << ". The tolerance is : " << tolerance << std::endl;
return 0;
}
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