Could be used to obtain spatial depths, spatial ranks and outliers of multivariate random variables. Could also be used to visualize DD-plots (a multivariate generalization of QQ-plots).
Omker Mahalanobish [aut],
Somedip Karmakar [cre, aut]

depthTools is a package that implements different
statistical tools for the description and analysis of gene
expression data based on the concept of data depth, namely, the
scale curves for visualizing the dispersion of one or various
groups of samples (e.g. types of tumors), a rank test to decide
whether two groups of samples come from a single distribution
and two methods of supervised classification techniques, the DS
and TAD methods. All these techniques are based on the Modified
Band Depth, which is a recent notion of depth with a low
computational cost, what renders it very appropriate for high
dimensional data such as gene expression data.

Implementation of different statistical tools for the
description and analysis of gene expression data based on the
concept of data depth, namely, the scale curves for
visualizing the dispersion of one or various groups of samples
(e.g. types of tumors), a rank test to decide whether two groups
of samples come from a single distribution and two methods of
supervised classification techniques, the DS and TAD methods.
All these techniques are based on the Modified Band Depth, which
is a recent notion of depth with a low computational cost, what
renders it very appropriate for high dimensional data such as
gene expression data.

Offers a special data structure called a 'deque'
(pronounced like 'deck'), which is a list-like structure.  However,
unlike R's list structure, data put into a 'deque' is not necessarily
stored contiguously, making insertions and deletions at the front/end
of the structure much faster.  The implementation here is new and
uses a doubly linked list, and whence does not rely on R's
environments.  To avoid unnecessary data copying, most 'deque'
operations are performed via side-effects.