Plot using the Bark scale.

Transforms the axes of a ggplot into the bark scale. The data is still plotted in Hz. If you want to plot the data in Barks themselves, transform the data beforehand and plot normally. For an example of plots using this scale, see Harrington et al. (2000).

scale_x_bark(..., rev = TRUE)

scale_y_bark(..., rev = TRUE)

Arguments

...	Parameters passed on to scale_x_continuous
rev	Should the axis be flipped? Or rather, would you normally use scale_x_reverse for this plot? TRUE by default, making it easiest for F1-F2 plot. You can do this in spectrogram-like plots (time vs. hz) to emphasize change in F1, but you'll probably want to specify rev = FALSE.

References

Harrington, Jonathan, Sallyanne Palethorpe, and Catherine Watson. "Monophthongal Vowel Changes in Received Pronunciation: An Acoustic Analysis of the Queen’s Christmas Broadcasts." Journal of the International Phonetic Association 30, no. 1–2 (2000): 63–78. https://doi.org/10.1017/S0025100300006666

Examples

library(ggplot2)

# You can use this function wherever you'd use `scale_x_reverse` or 
# `scale_y_reverse`. Here is a simple F1-F2 plot:
data(vowels)
ggplot(vowels, aes(F2, F1, color = vowel)) +
   geom_point() +
   scale_x_bark() +
   scale_y_bark()

# If you want to plot a spectrogram-like plot, you only need `scale_y_bark`. 
# Be sure to set `rev=TRUE` so that the axis is not reversed.
data(mouth)
ggplot(mouth, aes(percent, hz, color = formant, group = traj_id)) +
   geom_path(alpha = 0.5) +
   scale_y_bark(rev = FALSE)