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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.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.