diff options
Diffstat (limited to 'src/Persistence_representations/example/persistence_landscape_on_grid.cpp')
-rw-r--r-- | src/Persistence_representations/example/persistence_landscape_on_grid.cpp | 107 |
1 files changed, 50 insertions, 57 deletions
diff --git a/src/Persistence_representations/example/persistence_landscape_on_grid.cpp b/src/Persistence_representations/example/persistence_landscape_on_grid.cpp index 276b7a44..75461fc6 100644 --- a/src/Persistence_representations/example/persistence_landscape_on_grid.cpp +++ b/src/Persistence_representations/example/persistence_landscape_on_grid.cpp @@ -20,69 +20,62 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ - - #include <gudhi/Persistence_landscape_on_grid.h> - - using namespace Gudhi; using namespace Gudhi::Persistence_representations; #include <iostream> +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 landscapes based on persistence1 and persistence2: + Persistence_landscape_on_grid l1(persistence1, 0, 11, 20); + Persistence_landscape_on_grid l2(persistence2, 0, 11, 20); + + // This is how to compute integral of landscapes: + std::cout << "Integral of the first landscape : " << l1.compute_integral_of_landscape() << std::endl; + std::cout << "Integral of the second landscape : " << l2.compute_integral_of_landscape() << std::endl; + + // And here how to write landscapes to stream: + std::cout << "l1 : " << l1 << std::endl; + std::cout << "l2 : " << l2 << std::endl; + + // here are the maxima of the functions: + std::cout << "Maximum of l1 : " << l1.compute_maximum() << std::endl; + std::cout << "Maximum of l2 : " << l2.compute_maximum() << std::endl; + + // here are the norms of landscapes: + std::cout << "L^1 Norm of l1 : " << l1.compute_norm_of_landscape(1.) << std::endl; + std::cout << "L^1 Norm of l2 : " << l2.compute_norm_of_landscape(1.) << std::endl; + + // here is the average of landscapes: + Persistence_landscape_on_grid average; + average.compute_average({&l1, &l2}); + std::cout << "average : " << average << std::endl; + + // here is the distance of landscapes: + std::cout << "Distance : " << l1.distance(l2) << std::endl; + + // here is the scalar product of landscapes: + std::cout << "Scalar product : " << l1.compute_scalar_product(l2) << std::endl; + + // here is how to create a file which is suitable for visualization via gnuplot: + average.plot("average_landscape"); -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 landscapes based on persistence1 and persistence2: - Persistence_landscape_on_grid l1( persistence1 , 0 , 11 , 20 ); - Persistence_landscape_on_grid l2( persistence2 , 0 , 11 , 20 ); - - //This is how to compute integral of landscapes: - std::cout << "Integral of the first landscape : " << l1.compute_integral_of_landscape() << std::endl; - std::cout << "Integral of the second landscape : " << l2.compute_integral_of_landscape() << std::endl; - - //And here how to write landscapes to stream: - std::cout << "l1 : " << l1 << std::endl; - std::cout << "l2 : " << l2 << std::endl; - - //here are the maxima of the functions: - std::cout << "Maximum of l1 : " << l1.compute_maximum() << std::endl; - std::cout << "Maximum of l2 : " << l2.compute_maximum() << std::endl; - - //here are the norms of landscapes: - std::cout << "L^1 Norm of l1 : " << l1.compute_norm_of_landscape( 1. ) << std::endl; - std::cout << "L^1 Norm of l2 : " << l2.compute_norm_of_landscape( 1. ) << std::endl; - - //here is the average of landscapes: - Persistence_landscape_on_grid average; - average.compute_average( {&l1,&l2} ); - std::cout << "average : " << average << std::endl; - - //here is the distance of landscapes: - std::cout << "Distance : " << l1.distance( l2 ) << std::endl; - - //here is the scalar product of landscapes: - std::cout << "Scalar product : " << l1.compute_scalar_product( l2 ) << std::endl; - - //here is how to create a file which is suitable for visualization via gnuplot: - average.plot( "average_landscape" ); - - - return 0; + return 0; } |