spp_levels {halk}

Check for species in columns and/or levels and add to levels if present

Description

These helper functions just check to see if a species column exists in the data (designated as 'spp' or 'species'). If one of those columns exists, but the column name is not in the levels argument it will get added to levels.

Usage

is_spp_in_levels(levels)

is_spp_in_data(data)

spp_level(levels)

rm_spp_level(levels)

add_spp_level(data, levels)

Arguments

levels

The levels argument passed from make_halk

data

A data.frame with length-at-age data

Value

A character vector of levels possibly with 'spp' or 'species' added