This package provides an implementation of the QuadTree
data structure. It uses this to implement fast k-Nearest
Neighbor and Rectangular range lookups.

The QuadTree data structure is useful for fast,
neighborhood-restricted lookups. We use it to implement fast k-Nearest
Neighbor and Rectangular range lookups in 2 dimenions. The
primary target is high performance interactive graphics.

The Second Dimension of Spatial Associations
Most of the current methods explore spatial associations using
observations at sample locations, which are defined as the first
dimension of spatial associations (FDA). The proposed concept of
the second dimension of spatial associations (SDA) aims to extract
in-depth information about the geographical environment from
locations outside sample locations for exploring spatial
associations.

The Second Dimension of Spatial Association
Most of the current methods explore spatial association using
observations at sample locations, which are defined as the first
dimension of spatial association (FDA). The proposed concept of
the second dimension of spatial association (SDA) aims to extract
in-depth information about the geographical environment from
locations outside sample locations for exploring spatial
association.

Density, distribution function, quantile function, random
generation and survival function for the Secant Kumaraswamy Weibull Distribution
as defined by SOUZA, L. New Trigonometric Class of Probabilistic Distributions.
219 p. Thesis (Doctorate in Biometry and Applied Statistics) - Department of
Statistics and Information, Federal Rural University of Pernambuco, Recife,
Pernambuco, 2015 (available at <http://www.openthesis.org/documents/New-trigonometric-classes-probabilistic-distributions-602633.html>) and BRITO, C. C. R. Method Distributions generator and
Probability Distributions Classes. 241 p. Thesis (Doctorate in Biometry and
Applied Statistics) - Department of Statistics and Information, Federal Rural
University of Pernambuco, Recife, Pernambuco, 2014 (available upon request).