Bitmap_cubical_complex/Bitmap_cubical_complex_periodic_boundary_conditions.cpp
/* This file is part of the Gudhi Library. The Gudhi library
* (Geometric Understanding in Higher Dimensions) is a generic C++
* library for computational topology.
*
* Author(s): Pawel Dlotko
*
* Copyright (C) 2015 INRIA Saclay (France)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gudhi/Bitmap_cubical_complex.h>
#include <gudhi/Bitmap_cubical_complex_periodic_boundary_conditions_base.h>
#include <gudhi/Persistent_cohomology.h>
// standard stuff
#include <iostream>
#include <sstream>
#include <vector>
int main(int argc, char** argv) {
std::cout << "This program computes persistent homology, by using " <<
"Bitmap_cubical_complex_periodic_boundary_conditions class, of cubical complexes provided in text files in " <<
"Perseus style (the only numbered in the first line is a dimension D of a bitmap. In the lines I between 2 " <<
"and D+1 there are numbers of top dimensional cells in the direction I. Let N denote product of the numbers " <<
"in the lines between 2 and D. In the lines D+2 to D+2+N there are filtrations of top dimensional cells. We " <<
"assume that the cells are in the lexicographical order. See CubicalOneSphere.txt or CubicalTwoSphere.txt for" <<
" example.\n" << std::endl;
int p = 2;
double min_persistence = 0;
if (argc != 2) {
std::cerr << "Wrong number of parameters. Please provide the name of a file with a Perseus style bitmap at " <<
"the input. The program will now terminate.\n";
return 1;
}
Bitmap_cubical_complex b(argv[1]);
// Compute the persistence diagram of the complex
Persistent_cohomology pcoh(b, true);
pcoh.init_coefficients(p); // initializes the coefficient field for homology
pcoh.compute_persistent_cohomology(min_persistence);
std::stringstream ss;
ss << argv[1] << "_persistence";
std::ofstream out(ss.str().c_str());
pcoh.output_diagram(out);
out.close();
std::cout << "Result in file: " << ss.str().c_str() << "\n";
return 0;
}
GUDHI  Version 2.0.0  - C++ library for Topological Data Analysis (TDA) and Higher Dimensional Geometry Understanding. Generated on Wed Apr 19 2017 22:26:16 for GUDHI by doxygen 1.8.11