Attach TextGrid landmark columns to a long-format f0 data frame

For each selected interval tier and each token, reads the token's TextGrid and tags every f0 frame with the interval it falls in. Adds four columns per tier, named from a sanitised tier name p: p (interval label), p_start, p_end (interval boundaries, seconds), and p_i (1-based segment index among labelled intervals — e.g. syllable 1, 2, 3 ...).

Usage

attach_landmarks(df, audio, tier_names, strip_ext = TRUE)

Arguments

df

Long-format f0 data frame with token and time columns.

audio

Data frame with basename and tg_path columns (fp_audio_data).

tier_names

Character vector of interval-tier names to attach.

strip_ext

Strip file extensions when matching token to basename.

Value

df with the landmark columns appended. Returned unchanged when there are no tiers, no token/time columns, or no matching TextGrids.