active_group: Access the active_group value

In sftrack: Modern Classes for Tracking and Movement Data

Access the active_group value

Description

The active group is the combination of group names to group the data sets. The active_group acts essentially like a paste(names_of_groups, sep = '_') grouping variable.

Usage

active_group(x)

Arguments

x	a c_grouping

Examples

#'
data("raccoon")
raccoon$timestamp <- as.POSIXct(raccoon$timestamp, "EST")
burstz <- list(id = raccoon$animal_id, month = as.POSIXlt(raccoon$timestamp)$mon)
mb1 <- make_c_grouping(x = burstz, active_group = c("id", "month"))

# see the current active burst
active_group(mb1)

# change the active burst
active_group(mb1) <- "id"

# Using a full data set
my_track <- as_sftrack(raccoon,
  time = "timestamp",
  error = NA, coords = c("longitude", "latitude"),
  group = burstz
)

summary(my_track)

# change active group
active_group(my_track$sft_group) <- "id"

summary(my_track)

sftrack documentation built on March 31, 2023, 7:27 p.m.