lookup: Lookup and entry in an object with names

In decisionpatterns/conformist: Utilities for conforming data to predefined standards

Description

Lookup and entry in an object with names

Usage

lookup(x, dict = getOption("dictionary", abbreviations), missing = NA)

Arguments

x	string; one-element character vector
dict	object that has a names attribute that is used to look up the associated values.
missing	value to return if the value cannot be found, (DEFAULT: NA) Looks up and returns the item(s) in dict matching the pattern given by x. If there is no matrching name found, the value provided in the missing argument is used. It is not uncommon to set missing to

Value

one or more values looked up by name in the dictionary. There is no guarantee that there will be only one item returned per-lookup

See Also

extract which is used internally to match names

Examples

  dict <- 1:26 
  names(dict) <- letters
  dict <- searchable(dict) 
  dict <- ignore.case(dict)
  
  lookup( ignore.case('M'), dict )    # 13
  lookup( 'M', dict )                 # NA
  lookup( 'M', dict, 'M' )            # M
  

decisionpatterns/conformist documentation built on Nov. 4, 2019, 10:23 a.m.