Define a filter for the eBird Basic Dataset (EBD) based on a range of dates.
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_date(x, date)
Arguments
| x |
|
|---|---|
| date | character or date; date range to filter by, provided either as a
character vector in the format |
Value
An auk_ebd object.
Details
To select observations from a range of dates, regardless of year,
the wildcard "*" can be used in place of the year. For example, using
date = c("*-05-01", "*-06-30") will return observations from May and June
of any year. When using wildcards, dates can wrap around the year end.
This function can also work with on an auk_sampling object if the user only
wishes to filter the sampling event data.
See also
Other filter:
auk_bbox(),
auk_bcr(),
auk_breeding(),
auk_complete(),
auk_country(),
auk_county(),
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()
Examples
system.file("extdata/ebd-sample.txt", package = "auk") %>% auk_ebd() %>% auk_date(date = c("2010-01-01", "2010-12-31"))#> Input #> EBD: /usr/local/lib/R/site-library/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: 2010-01-01 - 2010-12-31 #> Start time: all #> Last edited date: all #> Protocol: all #> Project code: all #> Duration: all #> Distance travelled: all #> Records with breeding codes only: no #> Complete checklists only: no# alternatively, without pipes ebd <- auk_ebd(system.file("extdata/ebd-sample.txt", package = "auk")) auk_date(ebd, date = c("2010-01-01", "2010-12-31"))#> Input #> EBD: /usr/local/lib/R/site-library/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: 2010-01-01 - 2010-12-31 #> Start time: all #> Last edited date: all #> Protocol: all #> Project code: all #> Duration: all #> Distance travelled: all #> Records with breeding codes only: no #> Complete checklists only: no# the * wildcard can be used in place of year to select dates from all years system.file("extdata/ebd-sample.txt", package = "auk") %>% auk_ebd() %>% # may-june records from all years auk_date(date = c("*-05-01", "*-06-30"))#> Input #> EBD: /usr/local/lib/R/site-library/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: *-05-01 - *-06-30 #> Start time: all #> Last edited date: all #> Protocol: all #> Project code: all #> Duration: all #> Distance travelled: all #> Records with breeding codes only: no #> Complete checklists only: no# dates can also wrap around the end of the year system.file("extdata/ebd-sample.txt", package = "auk") %>% auk_ebd() %>% # dec-jan records from all years auk_date(date = c("*-12-01", "*-01-31"))#> Input #> EBD: /usr/local/lib/R/site-library/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: *-12-01 - *-01-31 #> Start time: all #> Last edited date: all #> Protocol: all #> Project code: all #> Duration: all #> Distance travelled: all #> Records with breeding codes only: no #> Complete checklists only: no