linear_speed {swaRm}

Linear Speeds

Description

Given a set of locations defining a trajectory, this function computes the linear speeds between each pair of successive locations along the trajectory.

Usage

linear_speed(x, y, t, geo = FALSE)

linSpeed(x, y, t, 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.

t

A vector of timestamps 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 linear speeds between each pair of successive locations along the trajectory.

Author(s)

Simon Garnier, [e-mail]

See Also

linear_dist, linear_acc

Examples

x <- rnorm(25)
y <- rnorm(25, sd = 3)
t <- as.POSIXct(1:25, origin = Sys.time())
linear_speed(x, y, t)