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-rw-r--r--example/Persistent_cohomology/alpha_complex_persistence.cpp125
1 files changed, 0 insertions, 125 deletions
diff --git a/example/Persistent_cohomology/alpha_complex_persistence.cpp b/example/Persistent_cohomology/alpha_complex_persistence.cpp
deleted file mode 100644
index 9e84e91f..00000000
--- a/example/Persistent_cohomology/alpha_complex_persistence.cpp
+++ /dev/null
@@ -1,125 +0,0 @@
-#include <boost/program_options.hpp>
-
-#include <CGAL/Epick_d.h>
-
-#include <gudhi/Alpha_complex.h>
-#include <gudhi/Persistent_cohomology.h>
-// to construct a simplex_tree from alpha complex
-#include <gudhi/Simplex_tree.h>
-
-#include <iostream>
-#include <string>
-#include <limits> // for numeric_limits
-
-using Simplex_tree = Gudhi::Simplex_tree<>;
-using Filtration_value = Simplex_tree::Filtration_value;
-
-void program_options(int argc, char * argv[]
- , std::string & off_file_points
- , std::string & output_file_diag
- , Filtration_value & alpha_square_max_value
- , int & coeff_field_characteristic
- , Filtration_value & min_persistence);
-
-int main(int argc, char **argv) {
- std::string off_file_points;
- std::string output_file_diag;
- Filtration_value alpha_square_max_value;
- int coeff_field_characteristic;
- Filtration_value min_persistence;
-
- program_options(argc, argv, off_file_points, output_file_diag, alpha_square_max_value,
- coeff_field_characteristic, min_persistence);
-
- // ----------------------------------------------------------------------------
- // Init of an alpha complex from an OFF file
- // ----------------------------------------------------------------------------
- using Kernel = CGAL::Epick_d< CGAL::Dynamic_dimension_tag >;
- Gudhi::alpha_complex::Alpha_complex<Kernel> alpha_complex_from_file(off_file_points);
-
- Simplex_tree simplex;
- if (alpha_complex_from_file.create_complex(simplex, alpha_square_max_value)) {
- // ----------------------------------------------------------------------------
- // Display information about the alpha complex
- // ----------------------------------------------------------------------------
- std::cout << "Simplicial complex is of dimension " << simplex.dimension() <<
- " - " << simplex.num_simplices() << " simplices - " <<
- simplex.num_vertices() << " vertices." << std::endl;
-
- // Sort the simplices in the order of the filtration
- simplex.initialize_filtration();
-
- std::cout << "Simplex_tree dim: " << simplex.dimension() << std::endl;
- // Compute the persistence diagram of the complex
- Gudhi::persistent_cohomology::Persistent_cohomology< Simplex_tree,
- Gudhi::persistent_cohomology::Field_Zp > pcoh(simplex);
- // initializes the coefficient field for homology
- pcoh.init_coefficients(coeff_field_characteristic);
-
- pcoh.compute_persistent_cohomology(min_persistence);
-
- // Output the diagram in filediag
- if (output_file_diag.empty()) {
- pcoh.output_diagram();
- } else {
- std::cout << "Result in file: " << output_file_diag << std::endl;
- std::ofstream out(output_file_diag);
- pcoh.output_diagram(out);
- out.close();
- }
- }
-
- return 0;
-}
-
-void program_options(int argc, char * argv[]
- , std::string & off_file_points
- , std::string & output_file_diag
- , Filtration_value & alpha_square_max_value
- , int & coeff_field_characteristic
- , Filtration_value & min_persistence) {
- namespace po = boost::program_options;
- po::options_description hidden("Hidden options");
- hidden.add_options()
- ("input-file", po::value<std::string>(&off_file_points),
- "Name of file containing a point set. Format is one point per line: X1 ... Xd ");
-
- po::options_description visible("Allowed options", 100);
- visible.add_options()
- ("help,h", "produce help message")
- ("output-file,o", po::value<std::string>(&output_file_diag)->default_value(std::string()),
- "Name of file in which the persistence diagram is written. Default print in std::cout")
- ("max-alpha-square-value,r",
- po::value<Filtration_value>(&alpha_square_max_value)->default_value(std::numeric_limits<Filtration_value>::infinity()),
- "Maximal alpha square value for the Alpha complex construction.")
- ("field-charac,p", po::value<int>(&coeff_field_characteristic)->default_value(11),
- "Characteristic p of the coefficient field Z/pZ for computing homology.")
- ("min-persistence,m", po::value<Filtration_value>(&min_persistence),
- "Minimal lifetime of homology feature to be recorded. Default is 0. Enter a negative value to see zero length intervals");
-
- po::positional_options_description pos;
- pos.add("input-file", 1);
-
- po::options_description all;
- all.add(visible).add(hidden);
-
- po::variables_map vm;
- po::store(po::command_line_parser(argc, argv).
- options(all).positional(pos).run(), vm);
- po::notify(vm);
-
- if (vm.count("help") || !vm.count("input-file")) {
- std::cout << std::endl;
- std::cout << "Compute the persistent homology with coefficient field Z/pZ \n";
- std::cout << "of an Alpha complex defined on a set of input points.\n \n";
- std::cout << "The output diagram contains one bar per line, written with the convention: \n";
- std::cout << " p dim b d \n";
- std::cout << "where dim is the dimension of the homological feature,\n";
- std::cout << "b and d are respectively the birth and death of the feature and \n";
- std::cout << "p is the characteristic of the field Z/pZ used for homology coefficients." << std::endl << std::endl;
-
- std::cout << "Usage: " << argv[0] << " [options] input-file" << std::endl << std::endl;
- std::cout << visible << std::endl;
- std::abort();
- }
-}