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Diffstat (limited to 'src/Persistence_representations/include/gudhi/Persistence_intervals_with_distances.h')
-rw-r--r-- | src/Persistence_representations/include/gudhi/Persistence_intervals_with_distances.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/Persistence_representations/include/gudhi/Persistence_intervals_with_distances.h b/src/Persistence_representations/include/gudhi/Persistence_intervals_with_distances.h new file mode 100644 index 00000000..98543f2f --- /dev/null +++ b/src/Persistence_representations/include/gudhi/Persistence_intervals_with_distances.h @@ -0,0 +1,51 @@ +/* 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. + * Author(s): Pawel Dlotko + * + * Copyright (C) 2016 Inria + * + * Modification(s): + * - YYYY/MM Author: Description of the modification + */ + +#ifndef PERSISTENCE_INTERVALS_WITH_DISTANCES_H_ +#define PERSISTENCE_INTERVALS_WITH_DISTANCES_H_ + +#include <gudhi/Persistence_intervals.h> +#include <gudhi/Bottleneck.h> + +#include <limits> + +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<double>::max(), + double tolerance = (std::numeric_limits<double>::min)()) const { + if (power >= std::numeric_limits<double>::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_ |