From 9899ae167f281d10b1684dfcd02c6838c5bf28df Mon Sep 17 00:00:00 2001 From: Gard Spreemann Date: Fri, 2 Feb 2018 13:51:45 +0100 Subject: GUDHI 2.1.0 as released by upstream in a tarball. --- .../gudhi/Persistence_intervals_with_distances.h | 63 ++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 include/gudhi/Persistence_intervals_with_distances.h (limited to 'include/gudhi/Persistence_intervals_with_distances.h') diff --git a/include/gudhi/Persistence_intervals_with_distances.h b/include/gudhi/Persistence_intervals_with_distances.h new file mode 100644 index 00000000..79908883 --- /dev/null +++ b/include/gudhi/Persistence_intervals_with_distances.h @@ -0,0 +1,63 @@ +/* This file is part of the Gudhi hiLibrary. The Gudhi library + * (Geometric Understanding in Higher Dimensions) is a generic C++ + * library for computational topology. + * + * Author(s): Pawel Dlotko + * + * Copyright (C) 2016 INRIA (France) + * + * 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 . + */ + +#ifndef PERSISTENCE_INTERVALS_WITH_DISTANCES_H_ +#define PERSISTENCE_INTERVALS_WITH_DISTANCES_H_ + +#include +#include + +#include + +namespace Gudhi { +namespace Persistence_representations { + +class Persistence_intervals_with_distances : public Persistence_intervals { + public: + using Persistence_intervals::Persistence_intervals; + + /** + *Computations of distance from the current persistnce diagram to the persistence diagram given as a parameter of this + *function. + *The last but one parameter, power, is here in case we would like to compute p=th Wasserstein distance. At the + *moment, this method only implement Bottleneck distance, + * which is infinity Wasserstein distance. Therefore any power which is not the default std::numeric_limits< double + *>::max() will be ignored and an + * exception will be thrown. + * The last parameter, tolerance, it is an additiv error of the approimation, set by default to zero. + **/ + double distance(const Persistence_intervals_with_distances& second, double power = std::numeric_limits::max(), + double tolerance = (std::numeric_limits::min)()) const { + if (power >= std::numeric_limits::max()) { + return Gudhi::persistence_diagram::bottleneck_distance(this->intervals, second.intervals, tolerance); + } else { + std::cerr << "At the moment Gudhi do not support Wasserstein distances. We only support Bottleneck distance." + << std::endl; + throw "At the moment Gudhi do not support Wasserstein distances. We only support Bottleneck distance."; + } + } +}; + +} // namespace Persistence_representations +} // namespace Gudhi + +#endif // PERSISTENCE_INTERVALS_WITH_DISTANCES_H_ -- cgit v1.2.3