Tools for Topological Data Analysis. The package focuses on statistical analysis of persistent homology and density clustering. For that, this package provides an R interface for the efficient algorithms of the C++ libraries 'GUDHI' < https://project.inria.fr/gudhi/software/>, 'Dionysus' < https://www.mrzv.org/software/dionysus/>, and 'PHAT' < https://bitbucket.org/phat-code/phat/>. This package also implements methods from Fasy et al. (2014)