switch_transcriptions: Switch between transcription systems.

In JoeyStanley/joeyr: Functions for Vowel Data

Switch between transcription systems.

Description

A function to switch between ARPABET, Wells' Lexical Sets, the B_T set, and the IPA.

Usage

switch_transcriptions(
  x,
  .from,
  .to,
  ordered = TRUE,
  as_character = FALSE,
  warn = TRUE
)

arpa_to_b_t(...)

arpa_to_ipa(...)

arpa_to_wells(...)

b_t_to_arpa(...)

b_t_to_ipa(...)

b_t_to_wells(...)

ipa_to_arpa(...)

ipa_to_b_t(...)

ipa_to_wells(...)

wells_to_arpa(...)

wells_to_ipa(...)

wells_to_b_t(...)

Arguments

x	The vector containing the vowel labels you want to convert.
.from	an unquoted expression. By default, arpa, meaning the function will convert ARPABET symbols into another system.
.to	an unquoted expression. By default, wells, which will produce the original Wells labels. If set to "b_t", it will use the "B_T" frame.
ordered	a logical. by default, TRUE, which will return the factor in an order that goes approximately counter clockwise in the vowel space, with diphthongs last. If FALSE, it will retain the original order (which, unless already specified, will be alphabetical or the order in which R sees the individial levels).
as_character	a logical. FALSE by default, meaning it will return the vector as a factor in the order specified by ordered. If TRUE, it will return the vector as a character vector (and will silently ignore the ordered argument).
warn	a logical, TRUE by default. If there are levels in the vector that are not part of the predefined list above, a warning message will appear alerting you of that fact. The function will still work, but it's good to be alerted if there is unexpected input. If the ordered is set to TRUE then these extra levels will put at the end. This warning can be suppressed by setting this argument to FALSE.

Details

Linguists use different ways to code English vowels in a computer-friendly way. FAVE-Align and MFA use ARPABET, which assigns a two-letter code to each vowel phoneme (IY, IH, EY, EH, etc.). An alternative approach is to use a keyword denoting a lexical set, whether it be the original Wells keywords or an alternative using the "B_T" frame. See this blog post for more background.

The ARPABET symbols in this function are IY, IH, EY, EH, AE, AA, AO, AH, OW, UH, UW, AY, AW, OY, ER.

The original Wells' lexical keywords in this function are FLEECE, KIT, FACE, DRESS, TRAP, LOT, THOUGHT, STRUT, GOAT, FOOT, GOOSE, PRICE, MOUTH, CHOICE, and NURSE.

The lexical set using the B_T frame include BEET, BIT, BAIT, BET, BAT, BOT, BOUGHT, BUT, BOAT, BOOK, BOOT, BITE, BOUT, BOY, and BIRD.

The IPA symbols include i, ɪ, e, ɛ, æ, ɑ, ɔ, ʌ, o, ʊ, u, ɑɪ, ɑʊ, ɔɪ, and ɚ.

Note that arpa_to_wells is shorthand for switch_transcriptions(..., .from=arpa, .to=wells), and only exports to the Wells lexical sets. All other pairs of transcription systems have their own shortcut function as well (i.e. wells_to_b_t, b_t_to_ipa, ipa_to_wells, etc.).

Value

A vector with the factors recoded. Any string that is not in one of the preset lists of symbols will remain unchanged.

Examples

suppressPackageStartupMessages(library(tidyverse))

darla <- joeysvowels::darla 
darla %>%
  mutate(vowel = switch_transcriptions(vowel, .from = arpa, .to = wells)) %>%
  count(vowel)
  
darla %>%
  mutate(vowel = switch_transcriptions(vowel, .from = arpa, .to = wells, ordered = FALSE)) %>%
  count(vowel)

darla %>%
  mutate(vowel = switch_transcriptions(vowel, .from = arpa, .to = b_t, as_character = TRUE)) %>%
  count(vowel)
  
# Works even if not all vowel levels are present
darla %>%
  filter(vowel %in% c("IY", "AE", "AY", "UW")) %>%
  mutate(vowel = switch_transcriptions(vowel, .from = arpa, .to = b_t)) %>%
  count(vowel)
  
# Here's a non-tidyverse version (though tidyverse is still used under the hood)
darla$vowel <- switch_transcriptions(darla$vowel, .from = arpa, .to = b_t)

# Note that shortcut functions also exist:
darla %>%
  mutate(vowel = arpa_to_wells(vowel)) %>%
  count(vowel)
darla %>%
  mutate(vowel = arpa_to_b_t(vowel)) %>%
  count(vowel)

JoeyStanley/joeyr documentation built on April 7, 2023, 8:37 p.m.