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phutil 0.0.1

This is a new submission to CRAN.

Goals

The{phutil} packageis intended to be a low-level package for hosting persistence data. Itis part of theTDAverse suite of packages, which are designedto provide a collection of packages for enabling machine learning anddata science tasks using persistent homology.

Current features

The package currently exposes:

• a new data structure (thepersistenceclass) for hosting persistence data;
• a set of utility functions for coercing persistence data to and fromother data structures (e.g.,data.frame,tibble,list,matrix,PHom anddiagramclasses);
• a set of utility functions for computing Bottleneck and Wassersteindistances between two persistence diagrams (bottleneck_distance()andwasserstein_distance())and from a sample of persistence diagrams in a pairwise manner (bottleneck_pairwise_distance()andwasserstein_pairwise_distance()).

Dependencies

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

Computation of distances is performed using the BSD-licensedHera C++ library. The codeinterfacing R and C++ is generated by the header-only{cpp11} package which isMIT-licensed. Computation of pairwise distances is parallelized over thenumber of pairs usingOpenMP.