| auk_duration {auk} | R Documentation |
Filter the eBird data by duration
Description
Define a filter for the eBird Basic Dataset (EBD) based on the duration of
the checklist. This function only defines the filter and, once all filters
have been defined, auk_filter() should be used to call AWK and perform the
filtering. Note that checklists with no effort, such as incidental
observations, will be excluded if this filter is used since they have no
associated duration information.
Usage
auk_duration(x, duration)
Arguments
x |
|
duration |
integer; 2 element vector specifying the range of durations in minutes to filter by. |
Details
This function can also work with on an auk_sampling object if the
user only wishes to filter the sampling event data.
Value
An auk_ebd object.
See Also
Other filter:
auk_bbox(),
auk_bcr(),
auk_breeding(),
auk_complete(),
auk_country(),
auk_county(),
auk_date(),
auk_distance(),
auk_exotic(),
auk_extent(),
auk_filter(),
auk_last_edited(),
auk_observer(),
auk_project(),
auk_protocol(),
auk_species(),
auk_state(),
auk_time(),
auk_year()
Examples
# only keep checklists that are less than an hour long
system.file("extdata/ebd-sample.txt", package = "auk") %>%
auk_ebd() %>%
auk_duration(duration = c(0, 60))
# alternatively, without pipes
ebd <- auk_ebd(system.file("extdata/ebd-sample.txt", package = "auk"))
auk_duration(ebd, duration = c(0, 60))