Counts syllables in character vectors. For English, this looks up syllables from the Carnegie Mellon University Pronouncing Dictionary, or guesses the syllables as the number of vowel sequences for words not found. User-supplied syllable word lists are also supported.
We hope to add lookup tables for additional languages in the future.
# remotes package required to install nsyllable from Github remotes::install_github("quanteda/nsyllable")
nsyllable() counts the syllables in each element of a character
vector, and returns the integer vector of the syllable counts. If
use.names = TRUE, then the output vector is named. The default (and
currently, only) language implemented is English.
library("nsyllable") charvec <- c("testing", "Aachen", "supercalifragilisticexpialidocious") nsyllable(charvec) ##  2 2 14 nsyllable(charvec, use.names = TRUE) ## testing Aachen ## 2 2 ## supercalifragilisticexpialidocious ## 14
User-supplied dictionaries can also be used, and these will override the
language argument. Below, “excellent” is still (correctly) counted,
but not because it looked up the results in the English dictionary, but
because it counted the vowel sequences. This gets “noel” wrong, however.
nsyllable(c("excellent", "noel", "film"), use.names = TRUE) ## excellent noel film ## 3 2 1 # redefine the syllables as it's pronounced in parts of Ireland mydict <- c("film" = 2L) # looks up "excellent" and does the vowel count nsyllable(c("excellent", "noel", "film"), syllable_dictionary = mydict, use.names = TRUE) ## excellent noel film ## 3 1 2
To not use the English dictionary and count only vowel sequences, set
NULL. This will likely to be a good
approximation for many Western languages.
nsyllable(c("Dies", "ist", "eine", "Demonstration"), syllable_dictionary = NULL, use.names = TRUE) ## Dies ist eine Demonstration ## 1 1 2 4
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