Propensity score matching for non-binary treatments.

Trimmed k-means clustering. The method is described in Cuesta-Albertos et al. (1997) <doi:10.1214/aos/1031833664>.

Information on all of the TriMet stops in the Portland Metro Area. It includes information such as the longitude, latitude, cross street, and direction of the stop. TriMet has catalogued these stops, 6880 in total.

Provides various commonly-used response time trimming
    methods, including the recursive / moving-criterion methods reported by
    Van Selst and Jolicoeur (1994). By passing trimming functions raw data files,
    the package will return trimmed data ready for inferential testing.

Several statistical test functions as well as a function for exploratory data
  analysis to investigate classifiers allocating individuals to one of three disjoint and
  ordered classes. In a single classifier assessment the discriminatory power is compared
  to classification by chance. In a comparison of two classifiers the null hypothesis
  corresponds to equal discriminatory power of the two classifiers.
  See also "ROC Analysis for Classification and Prediction in Practice" by Nakas, Bantis
  and Gatsonis (2023), ISBN 9781482233704.

Fit a trio model via penalized maximum likelihood. The model is fit for a path of values of the penalty parameter. This package is based on Noah Simon, et al. (2011) <doi:10.1080/10618600.2012.681250>.

Access and manipulate spatial tracking data, with straightforward 
 coercion from and to other formats. Filter for speed and create time spent 
 maps from tracking data. There are coercion methods to convert between 'trip'
 and 'ltraj' from 'adehabitatLT', and between 'trip' and 'psp' and 'ppp' from 
 'spatstat'. Trip objects can be created from raw or grouped data frames, and 
 from types in the 'sp', sf', 'amt', 'trackeR', 'mousetrap', and other packages, 
 Sumner, MD (2011) <https://figshare.utas.edu.au/articles/thesis/The_tag_location_problem/23209538>.

A constrained two-dimensional Delaunay triangulation package
  providing both triangulation and generation of voronoi mosaics of 
  irregular spaced data.
  Please note that most of the functions are now also covered in package
  interp, which is a re-implementation from scratch under a free license
  based on a different triangulation algorithm.