segclust2d (version 0.3.3)

add_covariates: Covariate Calculations

Description

Add several covariates to movement observations add_covariates add several covariates to a data frame with movement information. It adds : distance between location, spatial angle, speed, smoothed speed, persistence and rotation velocity (calculated with spatial angle).

Usage

add_covariates(x, ...)
# S3 method for Move
add_covariates(x, coord.names = c("x", "y"), ...)
# S3 method for ltraj
add_covariates(x, coord.names = c("x", "y"), ...)
# S3 method for data.frame
add_covariates(
  x,
  coord.names = c("x", "y"),
  smoothed = FALSE,
  timecol = "dateTime",
  units = "hour",
  radius = NULL,
  ...
)

Value

data.frame with additional covariates

Arguments

x

movement data

...

additional arguments

coord.names

names of coordinates column in x

smoothed

whether speed are smoothed or not

timecol

names of POSIXct time column

units

units for time calculation. Default "hour"

radius

for spatial angle calculations

Examples

if (FALSE) add_covariates(move_object, coord.names = c("x","y"), smoothed = T)
if (FALSE) {
data(simulmode)
simple_data <- simulmode[,c("dateTime","x","y")]
full_data   <- add_covariates(simple_data, coord.names = c("x","y"),
 timecol = "dateTime",smoothed = TRUE, units ="min")
}