summaryrefslogtreecommitdiff
path: root/src/Persistence_representations/example/persistence_landscape_on_grid.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/Persistence_representations/example/persistence_landscape_on_grid.cpp')
-rw-r--r--src/Persistence_representations/example/persistence_landscape_on_grid.cpp107
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;
}