Exotic codes are applied to eBird observations when the species is believe to
be non-native to the given location. This function defines a filter for the
eBird Basic Dataset (EBD) to subset observations to one or more of the exotic
codes: "" (i.e. no code, meaning it is a native species), "N" (naturalized),
"P" (provisional), or "X" (escapee). 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.
auk_exotic(x, exotic_code, replace = FALSE)auk_ebd or auk_sampling object; reference to file created by
auk_ebd() or auk_sampling().
characterr; exotic codes to filter by. Note that an empty string (""), meaning no exotic code, is used for native species.
logical; multiple calls to auk_exotic() are additive,
unless replace = FALSE, in which case the previous list of states to
filter by will be removed and replaced by that in the current call.
An auk_ebd object.
Other filter:
auk_bbox(),
auk_bcr(),
auk_breeding(),
auk_complete(),
auk_country(),
auk_county(),
auk_date(),
auk_distance(),
auk_duration(),
auk_extent(),
auk_filter(),
auk_last_edited(),
auk_observer(),
auk_project(),
auk_protocol(),
auk_species(),
auk_state(),
auk_time(),
auk_year()
# filter to only native observations
ebd <- auk_ebd(system.file("extdata/ebd-sample.txt", package = "auk"))
auk_exotic(ebd, exotic_code = "")
#> Input
#> EBD: /private/var/folders/mg/qh40qmqd7376xn8qxd6hm5lwjyy0h2/T/RtmpBEc62Y/temp_libpath32473f2f276e/auk/extdata/ebd-sample.txt
#>
#> Output
#> Filters not executed
#>
#> Filters
#> Species: all
#> Countries: all
#> States: all
#> Counties: all
#> BCRs: all
#> Bounding box: full extent
#> Years: all
#> Date: all
#> Start time: all
#> Last edited date: all
#> Protocol: all
#> Project code: all
#> Duration: all
#> Distance travelled: all
#> Records with breeding codes only: no
#> Exotic Codes: Native
#> Complete checklists only: no
# filter to native and naturalized observations
auk_exotic(ebd, exotic_code = c("", "N"))
#> Input
#> EBD: /private/var/folders/mg/qh40qmqd7376xn8qxd6hm5lwjyy0h2/T/RtmpBEc62Y/temp_libpath32473f2f276e/auk/extdata/ebd-sample.txt
#>
#> Output
#> Filters not executed
#>
#> Filters
#> Species: all
#> Countries: all
#> States: all
#> Counties: all
#> BCRs: all
#> Bounding box: full extent
#> Years: all
#> Date: all
#> Start time: all
#> Last edited date: all
#> Protocol: all
#> Project code: all
#> Duration: all
#> Distance travelled: all
#> Records with breeding codes only: no
#> Exotic Codes: Native, Naturalized
#> Complete checklists only: no