Given vowel data with the first column identifying speakers, the second identifying vowels, the third containing F1 and the fourth containing F2 values, plot a vowel space using the speaker's mean values for each vowel. Typically it is best to produce a plot from scratch. The primary purpose of this function is to generate quick plots for interactive use, rather than to produce plots for publication.
Usage
plot_vowel_space(
vowel_data,
speakers = NULL,
vowel_colours = NULL,
label_size = 4,
means_only = TRUE,
ellipses = FALSE,
point_alpha = 0.1,
facet = TRUE
)Arguments
- vowel_data
data frame of vowel tokens as described above.
- speakers
list of speaker identifiers for speaker whose vowel space is to be plotted.
- vowel_colours
a named list of vowel = colour entries to indicate which colour to plot each vowel.
- label_size
It is often convenient to adjust the size of the labels (in pts). Default is 4.
- means_only
whether to plot means only or all data points. Default: TRUE.
- ellipses
whether to 95% confidence ellipses. Only works if means_only is FALSE. Default is FALSE.
- point_alpha
alpha value for data points if means_only is FALSE.
- facet
whether to plot distinct speakers in distinct facets. Default is TRUE.
