diff options
Diffstat (limited to 'src/Persistence_representations/include/gudhi/common_persistence_representations.h')
| -rw-r--r-- | src/Persistence_representations/include/gudhi/common_persistence_representations.h | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/src/Persistence_representations/include/gudhi/common_persistence_representations.h b/src/Persistence_representations/include/gudhi/common_persistence_representations.h index 66ed3bf8..f0cd8146 100644 --- a/src/Persistence_representations/include/gudhi/common_persistence_representations.h +++ b/src/Persistence_representations/include/gudhi/common_persistence_representations.h @@ -43,16 +43,15 @@ static constexpr double pi = boost::math::constants::pi<double>(); using Persistence_diagram = std::vector<std::pair<double, double> >; /** - * In this module, we use the name Weight for the representation of a function taking a pair of two double and returning a double. + * In this module, we use the name Kernel for the representation of a function taking a pair of two points in the plane and returning a double. */ -using Weight = std::function<double (std::pair<double, double>) >; -using Kernel = std::function<double (std::pair<double, double>, std::pair<double, double> )>; +using Kernel2D = std::function<double (std::pair<double, double>, std::pair<double, double> )>; -Kernel Gaussian_kernel(double sigma){ +inline Kernel2D Gaussian_kernel(double sigma){ return [=](std::pair<double, double> p, std::pair<double, double> q){return (1.0 / (std::sqrt(2*pi)*sigma)) * std::exp( -((p.first-q.first)*(p.first-q.first) + (p.second-q.second)*(p.second-q.second)) / (2*sigma*sigma) );}; } -Kernel polynomial_kernel(double c, double d){ +inline Kernel2D polynomial_kernel(double c, double d){ return [=](std::pair<double, double> p, std::pair<double, double> q){return std::pow( p.first*q.first + p.second*q.second + c, d);}; } |