This function computes the stationary periods from the pressure and/or acceleration label data.
In most case, this function should be run directly after tag_label_read() in order to update
tag to correspond to the new label file.
A stationary period is a period during which the bird is considered static relative to the
spatial resolution of interest (~10-50km). They are defined by being separated by a flight of any
duration (label "flight"). The stap_id is an integer value for stationary periods and decimal
value for flight. The stap_id is added as a new column to each sensor data.
If an acceleration data.frame is present and contains a column label, the stationary period
will be computed from it, otherwise, it uses the pressure data.frame.
Value
tag is return with (1) a new data.frame of stationary periods tag$stap and (2) a new
column stap_id for each sensor data.
See also
Other tag_label:
tag_label(),
tag_label_auto(),
tag_label_read(),
tag_label_write()
Examples
withr::with_dir(system.file("extdata", package = "GeoPressureR"), {
tag <- tag_create("18LX", quiet = TRUE) |>
tag_label_read()
tag <- tag_label_stap(tag)
str(tag)
str(tag$stap)
})
#> ── Short stationary periods (<6hr): ────────────────────────────────────────────
#> ✔ All 5 stationary periods duration are above 6 hours.
#> ── Short flights (<2hr): ───────────────────────────────────────────────────────
#> ✔ All 4 flights duration are above 2 hours.
#> List of 6
#> $ param :List of 4
#> ..$ id : chr "18LX"
#> ..$ GeoPressureR_version:Classes 'package_version', 'numeric_version' hidden list of 1
#> .. ..$ : int [1:3] 3 3 2
#> ..$ tag_create :List of 6
#> .. ..$ pressure_file : chr "./data/raw-tag/18LX/18LX_20180725.pressure"
#> .. ..$ light_file : chr "./data/raw-tag/18LX/18LX_20180725.glf"
#> .. ..$ acceleration_file : chr "./data/raw-tag/18LX/18LX_20180725.acceleration"
#> .. ..$ temperature_external_file: chr "./data/raw-tag/18LX/18LX_20180725.temperature"
#> .. ..$ manufacturer : chr "soi"
#> .. ..$ directory : 'glue' chr "./data/raw-tag/18LX"
#> ..$ label_file : 'glue' chr "./data/tag-label/18LX-labeled.csv"
#> ..- attr(*, "class")= chr "param"
#> $ pressure :'data.frame': 672 obs. of 4 variables:
#> ..$ date : POSIXct[1:672], format: "2017-07-27 00:00:00" "2017-07-27 00:30:00" ...
#> ..$ value : int [1:672] 989 989 990 990 989 989 990 990 991 990 ...
#> ..$ label : chr [1:672] "" "" "" "" ...
#> ..$ stap_id: num [1:672] 1 1 1 1 1 1 1 1 1 1 ...
#> $ light :'data.frame': 4032 obs. of 3 variables:
#> ..$ date : POSIXct[1:4032], format: "2017-07-27 00:00:00" "2017-07-27 00:05:00" ...
#> ..$ value : int [1:4032] 0 0 0 0 0 0 0 0 0 0 ...
#> ..$ stap_id: num [1:4032] 1 1 1 1 1 1 1 1 1 1 ...
#> $ acceleration :'data.frame': 4032 obs. of 5 variables:
#> ..$ date : POSIXct[1:4032], format: "2017-07-27 00:00:00" "2017-07-27 00:05:00" ...
#> ..$ value : int [1:4032] 0 0 0 0 0 0 0 0 0 0 ...
#> ..$ pitch : int [1:4032] 26 27 27 28 28 28 28 27 28 27 ...
#> ..$ label : chr [1:4032] "" "" "" "" ...
#> ..$ stap_id: num [1:4032] 1 1 1 1 1 1 1 1 1 1 ...
#> $ temperature_external:'data.frame': 2448 obs. of 2 variables:
#> ..$ date : POSIXct[1:2448], format: "2017-06-20 00:00:00" "2017-06-20 00:30:00" ...
#> ..$ value: int [1:2448] 32 32 32 32 32 33 33 32 33 32 ...
#> $ stap :'data.frame': 5 obs. of 3 variables:
#> ..$ stap_id: num [1:5] 1 2 3 4 5
#> ..$ start : POSIXct[1:5], format: "2017-07-26 23:57:30" "2017-08-04 23:17:30" ...
#> ..$ end : POSIXct[1:5], format: "2017-08-04 19:47:30" "2017-08-05 19:27:30" ...
#> - attr(*, "class")= chr "tag"
#> 'data.frame': 5 obs. of 3 variables:
#> $ stap_id: num 1 2 3 4 5
#> $ start : POSIXct, format: "2017-07-26 23:57:30" "2017-08-04 23:17:30" ...
#> $ end : POSIXct, format: "2017-08-04 19:47:30" "2017-08-05 19:27:30" ...