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persistence_vectors.cpp
/* 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_vectors.h>
#include <iostream>
#include <vector>
#include <cmath>
#include <iomanip>
#include <limits>
#include <utility>
using Vector_distances_in_diagram =
Gudhi::Persistence_representations::Vector_distances_in_diagram<Gudhi::Euclidean_distance>;
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 vectors based on persistence1 and persistence2:
Vector_distances_in_diagram v1(persistence1, std::numeric_limits<size_t>::max());
Vector_distances_in_diagram v2(persistence2, std::numeric_limits<size_t>::max());
// writing to a stream:
std::clog << "v1 : " << v1 << std::endl;
std::clog << "v2 : " << v2 << std::endl;
// averages:
Vector_distances_in_diagram average;
average.compute_average({&v1, &v2});
std::clog << "Average : " << average << std::endl;
// computations of distances:
std::clog << "l^1 distance : " << v1.distance(v2) << std::endl;
// computations of scalar product:
std::clog << "Scalar product of l1 and l2 : " << v1.compute_scalar_product(v2) << std::endl;
// create a file with a gnuplot script:
v1.plot("plot_of_vector_representation");
return 0;
}
Gudhi::Persistence_representations::Vector_distances_in_diagram
A class implementing persistence vectors.
Definition Persistence_vectors.h:54
Gudhi::Persistence_representations::Vector_distances_in_diagram::plot
void plot(const char *filename) const
Definition Persistence_vectors.h:178
Gudhi::Persistence_representations::Vector_distances_in_diagram::compute_average
void compute_average(const std::vector< Vector_distances_in_diagram * > &to_average)
Definition Persistence_vectors.h:490
Gudhi::Persistence_representations::Vector_distances_in_diagram::compute_scalar_product
double compute_scalar_product(const Vector_distances_in_diagram &second) const
Definition Persistence_vectors.h:616
Gudhi::Persistence_representations::Vector_distances_in_diagram::distance
double distance(const Vector_distances_in_diagram &second, double power=1) const
Definition Persistence_vectors.h:518