Simple and fast tool for transforming phytosociological 
    vegetation data into digital form for the following analysis.
    Danihelka, Chrtek, and Kaplan (2012, ISSN:00327786).
    Hennekens, and Schaminée (2001) <doi:10.2307/3237010>.
    Tichý (2002) <doi:10.1111/j.1654-1103.2002.tb02069.x>.
    Wickham, François, Henry, Müller (2022) <https://CRAN.R-project.org/package=dplyr>.

Set operations for many sets. The base functions for set operations
    in R can be used for only two sets. This package uses 'purr' to find the
    union, intersection and difference of three or more sets. This package also
    provides functions for pairwise set operations among several sets. Further, 
    based on 'ggplot2' and 'ggforce', a Venn diagram can be drawn for two or 
    three sets. For bigger data sets, a clustered heatmap showing presence/absence 
    of the elements of the sets can be drawn based on the 'pheatmap' package. 
    Finally, enrichment test can be applied to two sets whether an overlap is 
    statistically significant or not.

Build regular expressions using grammar and functionality inspired 
    by <https://github.com/VerbalExpressions>. Usage of the %>% is encouraged to
    build expressions in a chain-like fashion.

Query the main 'R' 'SVN' repository to find the
    versions 'r-release' and 'r-oldrel' refer to, and also all previous
    'R' versions and their release dates.

Retrieve, map and summarize data from the 'VertNet.org' 
    archives (<https://vertnet.org/>).  Functions allow searching by many 
    parameters, including 'taxonomic' names, places, and dates. In addition, 
    there is an interface for conducting spatially delimited searches, and 
    another for requesting large 'datasets' via email.

Wrappers around the 'xml2' and 'httr' packages to make it
    easy to download, then manipulate, HTML and XML.

Vector Graphics devices for 'Microsoft PowerPoint' and 
 'Microsoft Excel'. Functions extending package 'officer' are provided to 
 embed 'DrawingML' graphics into 'Microsoft PowerPoint' presentations and 
 'Microsoft Excel' workbooks.