Sorting of Trackframes — sort.trackframe • trackframe

Sort a trackframe into ascending or descending order, by track ID and time. If no id column is available only sorted by time.

Usage

# S3 method for class 'trackframe'
sort(x, decreasing = FALSE, ...)

Arguments

x: an object of class trackframe
decreasing: logical indicating if sort should be increasing or decreasing.
...: additional arguments passed to order

Value

an object of class trackframe

Examples

sort(
  as.trackframe(
    data.frame(
      x = 1:6,
      y = 1:6,
      t = as.POSIXct(c(2, 2, 2, 1, 1, 1)),
      id = c("Asa", "Betty", "Charlie", "Asa", "Betty", "Charlie")
    ),
    crs = NA
  )
)
#>   x y                   t      id
#> 4 4 4 1970-01-01 00:00:01     Asa
#> 1 1 1 1970-01-01 00:00:02     Asa
#> 5 5 5 1970-01-01 00:00:01   Betty
#> 2 2 2 1970-01-01 00:00:02   Betty
#> 6 6 6 1970-01-01 00:00:01 Charlie
#> 3 3 3 1970-01-01 00:00:02 Charlie