Sphericity

Given a set of locations, this function approximates the sphericity of the set by calculating the bivariate 95 the set.

Usage

sphericity(x, y)

Arguments

x

A vector of x coordinates.

y

A vector of y coordinates.

Value

A single numeric value corresponding to the ratio between the minor and major axis of the bivariate 95

close to 1 indicates that the set is approximately circular; a value close to 0 indicates that the set is strongly elongated.

See also

stretch

Author

Simon Garnier, garnier@njit.edu

Examples

x <- rnorm(25)
y <- rnorm(25, sd = 3)
sphericity(x, y)
#> [1] 0.4901357