Extract objects of prepositional phrases in row and column labels

This function extracts the objects of prepositional phrases from row and column labels. The format of the output is a list of named items, one name for each preposition encountered in labels. Objects are NA if there is no prepositional phrase starting with that preposition.

Usage

get_objects(
  labels,
  inf_notation = TRUE,
  notation = RCLabels::notations_list,
  choose_most_specific = FALSE,
  prepositions = RCLabels::prepositions_list
)

Arguments

labels: The row and column labels from which prepositional phrases are to be extracted.
inf_notation: A boolean that tells whether to infer notation for x. Default is TRUE. See infer_notation() for details.
notation: The notation type to be used when extracting prepositions. Default is RCLabels::notations_list, meaning that the notation is inferred using infer_notation().
choose_most_specific: A boolean that tells whether to choose the most specific notation from notation when inferring notation. Default is FALSE so that a less specific notation can be inferred. In combination with RCLabels::notations_list, the default value of FALSE means that RCLabels::bracket_notation will be selected instead of anything more specific, such as RCLabels::from_notation.
prepositions: A vector of strings to be treated as prepositions. Note that a space is appended to each word internally, so, e.g., "to" becomes "to ". Default is RCLabels::prepositions_list.

Value

A list of objects of prepositional phrases, with names being prepositions, and values being objects.

Examples

get_objects(c("a [of b into c]", "d [of Coal from e -> f]"))
#> $objects
#>   of into 
#>  "b"  "c" 
#> 
#> $objects
#>      
#> "f]" 
#>