/* 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) 2016 INRIA (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 .
*/
#include
#include
#include
using namespace Gudhi;
using namespace Gudhi::Persistence_representations;
int main(int argc, char** argv) {
std::cout << "This program compute a histogram of barcode's length. A number of bins in the histogram is a parameter "
"of this program. \n";
if (argc != 3) {
std::cout << "To run this program, please provide the name of a file with persistence diagram and number of "
"dominant intervals you would like to get \n";
std::cout << "The third parameter of a program is the dimension of the persistence that is to be used. If your "
"file contains only birth-death pairs, you can skip this parameter\n";
return 1;
}
unsigned dimension = std::numeric_limits::max();
int dim = -1;
if (argc > 2) {
dim = atoi(argv[2]);
}
if (dim >= 0) {
dimension = (unsigned)dim;
}
Persistence_intervals p(argv[1], dimension);
std::vector > dominant_intervals = p.dominant_intervals(atoi(argv[2]));
std::vector histogram = p.histogram_of_lengths(10);
std::stringstream gnuplot_script;
gnuplot_script << argv[1] << "_Gnuplot_script";
std::ofstream out;
out.open(gnuplot_script.str().c_str());
out << "set style data histogram" << std::endl;
out << "set style histogram cluster gap 1" << std::endl;
out << "set style fill solid border -1" << std::endl;
out << "plot '-' notitle" << std::endl;
for (size_t i = 0; i != histogram.size(); ++i) {
out << histogram[i] << std::endl;
}
out << std::endl;
std::cout << "To visualize, open gnuplot and type: load \'" << gnuplot_script.str().c_str() << "\'" << std::endl;
out.close();
return 0;
}