diff options
author | Gard Spreemann <gspreemann@gmail.com> | 2018-02-02 14:05:27 +0100 |
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committer | Gard Spreemann <gspreemann@gmail.com> | 2018-02-02 14:05:27 +0100 |
commit | df9caafd97960a610906a79cf40ba52e40c6cf48 (patch) | |
tree | a9c0b0330239e6438510432b0ba78f35799224d9 /example/Persistence_representations/persistence_vectors.cpp | |
parent | 5bb200877fac0090032b9d56b782d2ae361efa9b (diff) | |
parent | 8e51c74d8855a641c006765ee246402e218828f3 (diff) |
Merge branch 'dfsg/latest' into debian/sid
Diffstat (limited to 'example/Persistence_representations/persistence_vectors.cpp')
-rw-r--r-- | example/Persistence_representations/persistence_vectors.cpp | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/example/Persistence_representations/persistence_vectors.cpp b/example/Persistence_representations/persistence_vectors.cpp new file mode 100644 index 00000000..834ae644 --- /dev/null +++ b/example/Persistence_representations/persistence_vectors.cpp @@ -0,0 +1,74 @@ +/* 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 (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 <http://www.gnu.org/licenses/>. + */ + +#include <gudhi/Persistence_vectors.h> + +#include <iostream> +#include <vector> +#include <cmath> +#include <iomanip> +#include <limits> +#include <utility> + +using Vector_distances_in_diagram = + Gudhi::Persistence_representations::Vector_distances_in_diagram<Gudhi::Euclidean_distance>; + +int main(int argc, char** argv) { + // create two simple vectors with birth--death pairs: + + std::vector<std::pair<double, double> > persistence1; + std::vector<std::pair<double, double> > persistence2; + + persistence1.push_back(std::make_pair(1, 2)); + persistence1.push_back(std::make_pair(6, 8)); + persistence1.push_back(std::make_pair(0, 4)); + persistence1.push_back(std::make_pair(3, 8)); + + persistence2.push_back(std::make_pair(2, 9)); + persistence2.push_back(std::make_pair(1, 6)); + persistence2.push_back(std::make_pair(3, 5)); + persistence2.push_back(std::make_pair(6, 10)); + + // create two persistence vectors based on persistence1 and persistence2: + Vector_distances_in_diagram v1(persistence1, std::numeric_limits<size_t>::max()); + Vector_distances_in_diagram v2(persistence2, std::numeric_limits<size_t>::max()); + + // writing to a stream: + std::cout << "v1 : " << v1 << std::endl; + std::cout << "v2 : " << v2 << std::endl; + + // averages: + Vector_distances_in_diagram average; + average.compute_average({&v1, &v2}); + std::cout << "Average : " << average << std::endl; + + // computations of distances: + std::cout << "l^1 distance : " << v1.distance(v2) << std::endl; + + // computations of scalar product: + std::cout << "Scalar product of l1 and l2 : " << v1.compute_scalar_product(v2) << std::endl; + + // create a file with a gnuplot script: + v1.plot("plot_of_vector_representation"); + + return 0; +} |