nsd {swaRm}

Net Squared Displacement

Description

Given a set of locations defining a trajectory, this function computes the net squared displacement of the trajectory, that is the squared distances between each location and the first location of the trajectory

Usage

nsd(x, y, geo = FALSE)

Arguments

x

A vector of x (or longitude) coordinates corresponding to a single trajectory.

y

A vector of y (or latitude) coordinates corresponding to a single trajectory.

geo

A logical value indicating whether the locations are defined by geographic coordinates (pairs of longitude/latitude values). Default: FALSE.

Value

A vector of the same length as x and y corresponding to the net squared distances between each location and the first location of the trajectory.

Author(s)

Simon Garnier, [e-mail]

See Also

linear_dist

Examples

x <- rnorm(25)
y <- rnorm(25, sd = 3)
nsd(x, y)