Encode network data as strings of printable ASCII characters. Implemented 
    functions include encoding and decoding adjacency matrices, edgelists, igraph, and
    network objects to/from formats 'graph6', 'sparse6', and 'digraph6'. The formats and
    methods are described in McKay, B.D. and Piperno, A (2014)
    <doi:10.1016/j.jsc.2013.09.003>.

Data and Functions from the book R Graphics, Third Edition. There is a function to produce each figure in the book, plus several functions, classes, and methods defined in Chapter 8.

Interface to integrate 'igraph' and 'ggplot2' graphics in a normalized coordinate system. 'RGraphSpace' implements new geometric objects using 'ggplot2' prototypes, customized for side-by-side visualization of multiple graphs. By scaling shapes and graph elements, 'RGraphSpace' can provide a framework for layered visualizations.

An interface between the 'GRASS' geographical information system ('GIS') and 'R', based on starting 'R' from within the 'GRASS' 'GIS' environment, or running a free-standing 'R' session in a temporary 'GRASS' location; the package provides facilities for using all 'GRASS' commands from the 'R' command line. The original interface package for 'GRASS 5' (2000-2010) is described in Bivand (2000) <doi:10.1016/S0098-3004(00)00057-1> and Bivand (2001) <https://www.r-project.org/conferences/DSC-2001/Proceedings/Bivand.pdf>. This was succeeded by 'spgrass6' for 'GRASS 6' (2006-2016) and 'rgrass7' for 'GRASS 7' (2015-present). The 'rgrass' package modernizes the interface for 'GRASS 8' while still permitting the use of 'GRASS 7'.

Fully 'DBI'-compliant interface to 'Greenplum' <https://greenplum.org/>,
    an open-source parallel database. This is an extension of the 'RPostgres'
    package <https://github.com/r-dbi/RPostgres>.

The tools and utilities to estimate the model described in "Gremlin's in the
    Data: Identifying the Information Content of Research Subjects" (Howell et al.
    (2021) <doi:10.1177/0022243720965930>)  using conjoint analysis data such as
    that collected in Sawtooth Software's 'Lighthouse' or 'Discover' products.
    Additional utilities are included for formatting the input data.