phutil 0.0.1

This is a new submission to CRAN.

Goals

The {phutil} package is intended to be a low-level package for hosting persistence data. It is part of the TDAverse suite of packages, which are designed to provide a collection of packages for enabling machine learning and data science tasks using persistent homology.

Current features

The package currently exposes:

• a new data structure (the persistence class) for hosting persistence data;
• a set of utility functions for coercing persistence data to and from other data structures (e.g., data.frame, tibble, list, matrix,PHom and diagram classes);
• a set of utility functions for computing Bottleneck and Wasserstein distances between two persistence diagrams (bottleneck_distance() and wasserstein_distance()) and from a sample of persistence diagrams in a pairwise manner (bottleneck_pairwise_distance() and wasserstein_pairwise_distance()).

Dependencies

Messages, warnings and errors are relayed to the user using the {rlang} package and the {cli} package which are both licensed under the MIT license and with no dependency trail.

Computation of distances is performed using the BSD-licensed Hera C++ library. The code interfacing R and C++ is generated by the header-only {cpp11} package which is MIT-licensed. Computation of pairwise distances is parallelized over the number of pairs using OpenMP.