metacoder (version 0.3.8)

map_data: Create a mapping between two variables

Description

Creates a named vector that maps the values of two variables associated with taxa in a [taxonomy()] or [taxmap()] object. Both values must be named by taxon ids.

obj$map_data(from, to, warn = TRUE)
map_data(obj, from, to, warn = TRUE)

Value

A vector of `to` values named by values in `from`.

Arguments

obj

The [taxonomy()] or [taxmap()] object.

from

The value used to name the output. There will be one output value for each value in `from`. Any variable that appears in [all_names()] can be used as if it was a variable on its own.

to

The value returned in the output. Any variable that appears in [all_names()] can be used as if it was a variable on its own.

warn

If `TRUE`, issue a warning if there are multiple unique values of `to` for each value of `from`.

See Also

Other taxonomy data functions: classifications(), id_classifications(), is_branch(), is_internode(), is_leaf(), is_root(), is_stem(), map_data_(), n_leaves(), n_leaves_1(), n_subtaxa(), n_subtaxa_1(), n_supertaxa(), n_supertaxa_1(), taxon_ids(), taxon_indexes(), taxon_names(), taxon_ranks()

Examples

# Mapping between two variables in `all_names(ex_taxmap)`
map_data(ex_taxmap, from = taxon_names, to = n_legs > 0)

# Mapping with external variables
x = c("d" = "looks like a cat", "h" = "big scary cats",
      "i" = "smaller cats", "m" = "might eat you", "n" = "Meow! (Feed me!)")
map_data(ex_taxmap, from = taxon_names, to = x)