Provides 'TOML' representations of packages
    needed that must be installed to run a project. Includes
    functions to specify detailed installation functions,
    validate files, and to use a given file as the requirements
    for a project. Handles package installations, when necessary,
    via 'pak'.

Provides access to coded election programmes from the Manifesto
    Corpus and to the Manifesto Project's Main Dataset and routines to analyse this
    data. The Manifesto Project <https://manifesto-project.wzb.eu> collects and
    analyses election programmes across time and space to measure the political
    preferences of parties. The Manifesto Corpus contains the collected and
    annotated election programmes in the Corpus format of the package 'tm' to enable
    easy use of text processing and text mining functionality. Specific functions
    for scaling of coded political texts are included.

Implements operations for Riemannian manifolds, e.g., geodesic distance, Riemannian metric, exponential and logarithm maps, etc. Also incorporates random object generator on the manifolds. See Dai, Lin, and Müller (2021) <doi:10.1111/biom.13385>.

An R interface to version 0.3 of the 'ROPTLIB' optimization library
    (see <https://www.math.fsu.edu/~whuang2/> for more information). Optimize
    real-valued functions over manifolds such as Stiefel, Grassmann, and
    symmetric positive definite matrices. For details see Martin et al. (2020)
    <doi:10.18637/jss.v093.i01>. Note that the optional 'ldr' package used in
    some of this package's examples can be obtained from either the article
    <doi:10.18637/jss.v061.i03> or from the 'ldr' package
    <https://cran.r-project.org/package=ldr>.

Interactive plotting functions for use within RStudio.
  The manipulate function accepts a plotting expression and a set of
  controls (e.g. slider, picker, checkbox, or button) which are used
  to dynamically change values within the expression. When a value is
  changed using its corresponding control the expression is
  automatically re-executed and the plot is redrawn.