amt: track – R documentation

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track

Create a track_*

Description

Constructor to crate a track, the basic building block of the amt package. A track is usually created from a set of x and y coordinates, possibly time stamps, and any number of optional columns, such as id, sex, age, etc.

Usage

mk_track(
  tbl,
  .x,
  .y,
  .t,
  ...,
  crs = NULL,
  order_by_ts = TRUE,
  check_duplicates = FALSE,
  all_cols = FALSE
)

make_track(
  tbl,
  .x,
  .y,
  .t,
  ...,
  crs = NULL,
  order_by_ts = TRUE,
  check_duplicates = FALSE,
  all_cols = FALSE
)

track(x, y, t, ..., crs = NULL)

Arguments

`tbl`	data.frame The `data.frame` from which a track should be created.
`.x, .y, .t`	`[expression(1)]` Unquoted variable names of columns containing the x and y coordinates, and optionally a time stamp.
`...`	`[expression]` Additional columns from `tbl` to be used in a track. Columns should be provided in the form of `key = val` (e.g., for ids this may look like this `id = c(1, 1, 1, 2, 2, 2` for three points for ids 1 and 2 each).
`crs`	`[sp::CRS]` An optional coordinate reference system of the points.
`order_by_ts`	`[logical(1)]` Should relocations be ordered by time stamp, default is `TRUE`.
`check_duplicates`	`[logical(1)=FALSE]` Should it be checked if there are duplicated time stamp, default is `FALSE`.
`all_cols`	`[logical(1)=FALSE]` Should all columns be carried over to the track object, default is `FALSE`.
`x, y`	`[numeric]` The x and y coordinates.
`t`	`[POSIXct]` The time stamp.

Value

If t was provided an object of class track_xyt is returned otherwise a track_xy.

amt

Animal Movement Tools

v0.1.4

GPL-3

Authors

Johannes Signer [aut, cre], Brian Smith [ctb], Bjoern Reineking [ctb], Ulrike Schlaegel [ctb], John Fieberg [ctb], Scott LaPoint [dtc]

Initial release

track

Description

Usage

Arguments

Value

amt

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