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+/* This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+ * See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
+ * Author(s): Pawel Dlotko
+ *
+ * Copyright (C) 2016 Inria
+ *
+ * Modification(s):
+ * - YYYY/MM Author: Description of the modification
+ */
+
+#include <gudhi/Persistence_landscape.h>
+
+#include <iostream>
+#include <vector>
+#include <utility>
+
+using Persistence_landscape = Gudhi::Persistence_representations::Persistence_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 l1(persistence1);
+ Persistence_landscape l2(persistence2);
+
+ // 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;
+
+ // Arithmetic operations on landscapes:
+ Persistence_landscape sum = l1 + l2;
+ std::cout << "sum : " << sum << 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 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;
+}