Mixed-format length data containing individual harvest measurements (numeric,
in mm) and binned release counts (character bin labels) linked to
example_interviews. Suitable for use with
add_lengths.
Format
A data frame with 20 rows and 5 columns:
- interview_id
Integer interview identifier. Foreign key to
example_interviews$interview_id.- species
Character. Species name:
"walleye","bass", or"panfish".- length
Character. For harvest rows, a numeric length in mm (stored as character due to mixed column). For release rows, a bin label such as
"300-350".- length_type
Character. Measurement fate:
"harvest"or"release".- count
Integer.
NA_integer_for harvest rows (individual measurements); positive integer count for release rows (binned format).
See also
example_interviews, example_catch,
add_lengths
Other "Example Datasets":
creel_counts_toy,
creel_interviews_toy,
example_aerial_counts,
example_aerial_glmm_counts,
example_aerial_interviews,
example_calendar,
example_camera_counts,
example_camera_interviews,
example_camera_timestamps,
example_catch,
example_counts,
example_ice_interviews,
example_ice_sampling_frame,
example_interviews,
example_sections_calendar,
example_sections_counts,
example_sections_interviews
Examples
data(example_calendar)
data(example_interviews)
data(example_lengths)
design <- creel_design(example_calendar, date = date, strata = day_type)
design <- add_interviews(design, example_interviews,
catch = catch_total, effort = hours_fished, harvest = catch_kept,
trip_status = trip_status, trip_duration = trip_duration
)
#> ℹ No `n_anglers` provided — assuming 1 angler per interview.
#> ℹ Pass `n_anglers = <column>` to use actual party sizes for angler-hour
#> normalization.
#> ℹ Added 22 interviews: 17 complete (77%), 5 incomplete (23%)
design <- add_lengths(design, example_lengths,
length_uid = interview_id,
interview_uid = interview_id,
species = species,
length = length,
length_type = length_type,
count = count,
release_format = "binned"
)
print(design)
#>
#> ── Creel Survey Design ─────────────────────────────────────────────────────────
#> Type: "instantaneous"
#> Date column: date
#> Strata: day_type
#> Calendar: 14 days (2024-06-01 to 2024-06-14)
#> day_type: 2 levels
#> Counts: "none"
#> Interviews: 22 observations
#> Type: "access"
#> Catch: catch_total
#> Effort: hours_fished
#> Harvest: catch_kept
#> Trip status: 17 complete, 5 incomplete
#> Survey: <survey.design2> (constructed)
#> Length Data: 20 rows, 3 species, length: 155–512 mm
#> harvest: 14 individual
#> release: 6 binned
#> Sections: "none"