diff options
Diffstat (limited to 'src/Persistence_representations/utilities/persistence_landscapes/compute_scalar_product_of_landscapes.cpp')
-rw-r--r-- | src/Persistence_representations/utilities/persistence_landscapes/compute_scalar_product_of_landscapes.cpp | 102 |
1 files changed, 46 insertions, 56 deletions
diff --git a/src/Persistence_representations/utilities/persistence_landscapes/compute_scalar_product_of_landscapes.cpp b/src/Persistence_representations/utilities/persistence_landscapes/compute_scalar_product_of_landscapes.cpp index 02b729b2..83121a9c 100644 --- a/src/Persistence_representations/utilities/persistence_landscapes/compute_scalar_product_of_landscapes.cpp +++ b/src/Persistence_representations/utilities/persistence_landscapes/compute_scalar_product_of_landscapes.cpp @@ -22,68 +22,58 @@ #include <gudhi/Persistence_landscape.h> - - using namespace Gudhi; using namespace Gudhi::Persistence_representations; #include <iostream> #include <sstream> +int main(int argc, char** argv) { + std::cout << "This program compute scalar product of persistence landscapes stored in a file (the file needs to be " + "created beforehand). \n"; + std::cout << "The parameters of this programs are names of files with persistence landscapes.\n"; + + std::vector<const char*> filenames; + for (int i = 1; i < argc; ++i) { + filenames.push_back(argv[i]); + } + std::vector<Persistence_landscape> landscaspes; + landscaspes.reserve(filenames.size()); + for (size_t file_no = 0; file_no != filenames.size(); ++file_no) { + std::cout << "Reading persistence landscape from a file : " << filenames[file_no] << std::endl; + Persistence_landscape l; + l.load_landscape_from_file(filenames[file_no]); + landscaspes.push_back(l); + } + + // and now we will compute the scalar product of landscapes. + + // first we prepare an array: + std::vector<std::vector<double> > scalar_product(filenames.size()); + for (size_t i = 0; i != filenames.size(); ++i) { + std::vector<double> v(filenames.size(), 0); + scalar_product[i] = v; + } + + // and now we can compute the scalar product: + for (size_t i = 0; i != landscaspes.size(); ++i) { + for (size_t j = i; j != landscaspes.size(); ++j) { + scalar_product[i][j] = scalar_product[j][i] = compute_inner_product(landscaspes[i], landscaspes[j]); + } + } -int main( int argc , char** argv ) -{ - std::cout << "This program compute scalar product of persistence landscapes stored in a file (the file needs to be created beforehand). \n"; - std::cout << "The parameters of this programs are names of files with persistence landscapes.\n"; + // and now output the result to the screen and a file: + std::ofstream out; + out.open("scalar_product"); + for (size_t i = 0; i != scalar_product.size(); ++i) { + for (size_t j = 0; j != scalar_product.size(); ++j) { + std::cout << scalar_product[i][j] << " "; + out << scalar_product[i][j] << " "; + } + std::cout << std::endl; + out << std::endl; + } + out.close(); - std::vector< const char* > filenames; - for ( int i = 1 ; i < argc ; ++i ) - { - filenames.push_back( argv[i] ); - } - std::vector< Persistence_landscape > landscaspes; - landscaspes.reserve( filenames.size() ); - for ( size_t file_no = 0 ; file_no != filenames.size() ; ++file_no ) - { - std::cout << "Reading persistence landscape from a file : " << filenames[file_no] << std::endl; - Persistence_landscape l; - l.load_landscape_from_file( filenames[file_no] ); - landscaspes.push_back( l ); - } - - //and now we will compute the scalar product of landscapes. - - //first we prepare an array: - std::vector< std::vector< double > > scalar_product( filenames.size() ); - for ( size_t i = 0 ; i != filenames.size() ; ++i ) - { - std::vector< double > v( filenames.size() , 0 ); - scalar_product[i] = v; - } - - //and now we can compute the scalar product: - for ( size_t i = 0 ; i != landscaspes.size() ; ++i ) - { - for ( size_t j = i ; j != landscaspes.size() ; ++j ) - { - scalar_product[i][j] = scalar_product[j][i] = compute_inner_product( landscaspes[i], landscaspes[j] ) ; - } - } - - //and now output the result to the screen and a file: - std::ofstream out; - out.open( "scalar_product" ); - for ( size_t i = 0 ; i != scalar_product.size() ; ++i ) - { - for ( size_t j = 0 ; j != scalar_product.size() ; ++j ) - { - std::cout << scalar_product[i][j] << " "; - out << scalar_product[i][j] << " "; - } - std::cout << std::endl; - out << std::endl; - } - out.close(); - - return 0; + return 0; } |