Define a filter for the eBird Basic Dataset (EBD) based on a range of start times for 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.

auk_time(x, start_time)

Arguments

x

auk_ebd or auk_sampling object; reference to file created by auk_ebd() or auk_sampling().

start_time

character; 2 element character vector giving the range of times in 24 hour format, e.g. "06:30" or "16:22".

Value

An auk_ebd object.

Details

This function can also work with on an auk_sampling object if the user only wishes to filter the sampling event data.

See also

Examples

# only keep checklists started between 6 and 8 in the morning system.file("extdata/ebd-sample.txt", package = "auk") %>% auk_ebd() %>% auk_time(start_time = c("06:00", "08:00"))
#> Input #> EBD: /cache/auk/extdata/ebd-sample.txt #> #> Output #> Filters not executed #> #> Filters #> Species: all #> Countries: all #> States: all #> BCRs: all #> Bounding box: full extent #> Date: all #> Start time: 06:00-08:00 #> 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_time(ebd, start_time = c("06:00", "08:00"))
#> Input #> EBD: /cache/auk/extdata/ebd-sample.txt #> #> Output #> Filters not executed #> #> Filters #> Species: all #> Countries: all #> States: all #> BCRs: all #> Bounding box: full extent #> Date: all #> Start time: 06:00-08:00 #> Last edited date: all #> Protocol: all #> Project code: all #> Duration: all #> Distance travelled: all #> Records with breeding codes only: no #> Complete checklists only: no