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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.
- *
- * Author(s): Pawel Dlotko
- *
- * Copyright (C) 2016 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/Persistence_heat_maps.h>
-
-#include <iostream>
-#include <vector>
-#include <utility>
-
-using constant_scaling_function = Gudhi::Persistence_representations::constant_scaling_function;
-using Persistence_heat_maps = Gudhi::Persistence_representations::Persistence_heat_maps<constant_scaling_function>;
-
-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));
-
- // over here we define a function we sill put on a top on every birth--death pair in the persistence interval. It can
- // be anything. Over here we will use standard Gaussian
- std::vector<std::vector<double> > filter = Gudhi::Persistence_representations::create_Gaussian_filter(5, 1);
-
- // creating two heat maps.
- Persistence_heat_maps hm1(persistence1, filter, false, 20, 0, 11);
- Persistence_heat_maps hm2(persistence2, filter, false, 20, 0, 11);
-
- std::vector<Persistence_heat_maps*> vector_of_maps;
- vector_of_maps.push_back(&hm1);
- vector_of_maps.push_back(&hm2);
-
- // compute median/mean of a vector of heat maps:
- Persistence_heat_maps mean;
- mean.compute_mean(vector_of_maps);
- Persistence_heat_maps median;
- median.compute_median(vector_of_maps);
-
- // to compute L^1 distance between hm1 and hm2:
- std::cout << "The L^1 distance is : " << hm1.distance(hm2, 1) << std::endl;
-
- // to average of hm1 and hm2:
- std::vector<Persistence_heat_maps*> to_average;
- to_average.push_back(&hm1);
- to_average.push_back(&hm2);
- Persistence_heat_maps av;
- av.compute_average(to_average);
-
- // to compute scalar product of hm1 and hm2:
- std::cout << "Scalar product is : " << hm1.compute_scalar_product(hm2) << std::endl;
-
- return 0;
-}