add_transitions: add_transitions function
In deponent-verb/birdsong.tools: What the Package Does in One 'Title Case' Line

Takes in a unit table of notes and adds a new column indicating the next adjacent note class transition. For example, if note A is immediately followed by note B, note A is recorded as having a A-B transition. The notes from each recording are treated separately.

1	add_transitions(unit_table)

unit_table:

A unit table tibble containing the original sound file, start/end times of the note,the note position and note_label.

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unit_table = tibble::tibble(start = c(0.37, 0.6, 0.2, 1.8), end = c(0.45, 0.7, 0.4, 2), pos = c(1,2,1,2),sound.files = c("JS001.wav","JS001.wav","JS002.wav","JS002.wav") , note_label = "Curve")
add_transitions(unit_table)