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bottleneck_distance.cpp
/* This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
* See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
* Authors: Francois Godi, small modifications by Pawel Dlotko
*
* Copyright (C) 2015 Inria
*
* Modification(s):
* - YYYY/MM Author: Description of the modification
*/
#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::clog << "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::clog << "The distance between the diagrams is : " << b << ". The tolerance is : " << tolerance << std::endl;
return 0;
}
Gudhi::persistence_diagram::bottleneck_distance
double bottleneck_distance(const Persistence_diagram1 &diag1, const Persistence_diagram2 &diag2, double e=(std::numeric_limits< double >::min)())
Function to compute the Bottleneck distance between two persistence diagrams.
Definition Bottleneck.h:116
Gudhi::read_persistence_intervals_in_dimension
std::vector< std::pair< double, double > > read_persistence_intervals_in_dimension(std::string const &filename, int only_this_dim=-1)
Definition reader_utils.h:355
reader_utils.h
This file includes common file reader for GUDHI.