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Diffstat (limited to 'src/Kernels/example/kernel_basic_example.cpp')
-rw-r--r-- | src/Kernels/example/kernel_basic_example.cpp | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/Kernels/example/kernel_basic_example.cpp b/src/Kernels/example/kernel_basic_example.cpp new file mode 100644 index 00000000..7ecbe401 --- /dev/null +++ b/src/Kernels/example/kernel_basic_example.cpp @@ -0,0 +1,65 @@ +/* This file is part of the Gudhi Library. The Gudhi library + * (Geometric Understanding in Higher Dimensions) is a generic C++ + * library for computational topology. + * + * Authors: Mathieu Carrière + * + * Copyright (C) 2017 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/kernel.h> +#include <iostream> +#include <string> +#include <fstream> +#include <sstream> + + +void usage(int nbArgs, char *const progName) { + std::cerr << "Error: Number of arguments (" << nbArgs << ") is not correct\n"; + std::cerr << "Usage: " << progName << " PD1 PD2 \n"; + std::cerr << " i.e.: " << progName << " ../../../../data/persistence_diagram/PD1.pers ../../../../data/persistence_diagram/PD2.pers \n"; + exit(-1); // ----- >> +} + +int main(int argc, char **argv) { + + if (argc != 3) usage(argc, argv[0]); + + double sigma = 2; double tau = 5; + + std::string PDname1(argv[1]); std::string PDname2(argv[2]); + std::vector< std::pair<double, double> > v1, v2; std::string line; double b,d; + + std::ifstream input1(PDname1); + while(std::getline(input1,line)){ + std::stringstream stream(line); stream >> b; stream >> d; v1.push_back(std::pair<double,double>(b,d)); + } + + std::ifstream input2(PDname2); + while(std::getline(input2,line)){ + std::stringstream stream(line); stream >> b; stream >> d; v2.push_back(std::pair<double,double>(b,d)); + } + + std::cout << "SWK exact = " << Gudhi::kernel::sliced_wasserstein_kernel (v1,v2,sigma,-1) << std::endl; + std::cout << "SWK approx = " << Gudhi::kernel::sliced_wasserstein_kernel (v1,v2,sigma) << std::endl; + std::cout << "PSSK exact = " << Gudhi::kernel::persistence_scale_space_kernel (v1,v2,sigma,-1) << std::endl; + std::cout << "PSSK approx = " << Gudhi::kernel::persistence_scale_space_kernel (v1,v2,sigma) << std::endl; + std::cout << "LPWGK exact = " << Gudhi::kernel::linear_persistence_weighted_gaussian_kernel (v1,v2,sigma,Gudhi::kernel::arctan_weight,-1) << std::endl; + std::cout << "LPWGK approx = " << Gudhi::kernel::linear_persistence_weighted_gaussian_kernel (v1,v2,sigma,Gudhi::kernel::arctan_weight) << std::endl; + std::cout << "GPWGK exact = " << Gudhi::kernel::gaussian_persistence_weighted_gaussian_kernel (v1,v2,sigma,tau,Gudhi::kernel::arctan_weight,-1) << std::endl; + std::cout << "GPWGK approx = " << Gudhi::kernel::gaussian_persistence_weighted_gaussian_kernel (v1,v2,sigma,tau,Gudhi::kernel::arctan_weight) << std::endl; + +} |