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Diffstat (limited to 'example/Witness_complex/example_strong_witness_complex_off.cpp')
-rw-r--r--example/Witness_complex/example_strong_witness_complex_off.cpp24
1 files changed, 12 insertions, 12 deletions
diff --git a/example/Witness_complex/example_strong_witness_complex_off.cpp b/example/Witness_complex/example_strong_witness_complex_off.cpp
index 0ee9ee90..346bef6d 100644
--- a/example/Witness_complex/example_strong_witness_complex_off.cpp
+++ b/example/Witness_complex/example_strong_witness_complex_off.cpp
@@ -23,6 +23,7 @@
#include <gudhi/Simplex_tree.h>
#include <gudhi/Euclidean_strong_witness_complex.h>
#include <gudhi/pick_n_random_points.h>
+#include <gudhi/choose_n_farthest_points.h>
#include <gudhi/Points_off_io.h>
#include <CGAL/Epick_d.h>
@@ -38,10 +39,9 @@ using Point_d = typename K::Point_d;
using Witness_complex = Gudhi::witness_complex::Euclidean_strong_witness_complex<K>;
using Point_vector = std::vector<Point_d>;
-int main(int argc, char * const argv[]) {
+int main(int argc, char* const argv[]) {
if (argc != 5) {
- std::cerr << "Usage: " << argv[0]
- << " path_to_point_file number_of_landmarks max_squared_alpha limit_dimension\n";
+ std::cerr << "Usage: " << argv[0] << " path_to_point_file number_of_landmarks max_squared_alpha limit_dimension\n";
return 0;
}
@@ -55,25 +55,25 @@ int main(int argc, char * const argv[]) {
Point_vector point_vector, landmarks;
Gudhi::Points_off_reader<Point_d> off_reader(file_name);
if (!off_reader.is_valid()) {
- std::cerr << "Strong witness complex - Unable to read file " << file_name << "\n";
- exit(-1); // ----- >>
- }
+ std::cerr << "Strong witness complex - Unable to read file " << file_name << "\n";
+ exit(-1); // ----- >>
+ }
point_vector = Point_vector(off_reader.get_point_cloud());
std::cout << "Successfully read " << point_vector.size() << " points.\n";
std::cout << "Ambient dimension is " << point_vector[0].dimension() << ".\n";
- // Choose landmarks
- Gudhi::subsampling::pick_n_random_points(point_vector, nbL, std::back_inserter(landmarks));
+ // Choose landmarks (decomment one of the following two lines)
+ // Gudhi::subsampling::pick_n_random_points(point_vector, nbL, std::back_inserter(landmarks));
+ Gudhi::subsampling::choose_n_farthest_points(K(), point_vector, nbL, Gudhi::subsampling::random_starting_point,
+ std::back_inserter(landmarks));
// Compute witness complex
start = clock();
- Witness_complex witness_complex(landmarks,
- point_vector);
+ Witness_complex witness_complex(landmarks, point_vector);
witness_complex.create_complex(simplex_tree, alpha2, lim_dim);
end = clock();
- std::cout << "Strong witness complex took "
- << static_cast<double>(end - start) / CLOCKS_PER_SEC << " s. \n";
+ std::cout << "Strong witness complex took " << static_cast<double>(end - start) / CLOCKS_PER_SEC << " s. \n";
std::cout << "Number of simplices is: " << simplex_tree.num_simplices() << "\n";
}