Varco C & Varco V

This function loads a dataframe as input and returns a dataframe containing the mean values of Varco C and Varco V.

Usage

varco_cv(df, cv_label, utterance_id, cv_duration)

Arguments

df

a data frame containing cv_labels, utterance_id, and cv_duration values.

cv_label

column name indicating whether a segment is a C(onsonant) or a V(owel).

utterance_id

column name for unique utterance IDs.

cv_duration

column name for the duration of C or V.

Value

a data frame containing the results of Varco C and Varco V values.

Details

Varco C and Varco V are rhythm metrics based on Dellwo, Volker (2006). Rhythm and Speech Rate: A Variation Coefficient for deltaC. In: Karnowski, P; Szigeti, I. Language and language-processing. Frankfurt/Main: Peter Lang, 231-241.

Varco C: Delta C / mean(C duration) * 100 Varco V: Delta V / mean(V duration) * 100

Author

Cong Zhang, cong.zhang@newcastle.ac.uk

Examples

df_test <- data.frame(cv_label = c("c", "v", "c", "v","c", "v", "c", "v"),
                      utterance_id = c("utt_1", "utt_1", "utt_2", "utt_2",
                                       "utt_3", "utt_3", "utt_4", "utt_4"),
                      cv_duration = c(0.1, 0.8, 0.2, 0.5, 0.3, 0.3, 0.4, 0.7))

varco_cv(df_test, cv_label, utterance_id, cv_duration)
#> # A tibble: 2 × 2
#>   cv_label varco_cv
#>   <chr>       <dbl>
#> 1 c             NaN
#> 2 v             NaN