Get meta-data of a track
get_track_data(field, track_index = current_track_index())
Name, see Details section.
There are following fields that can be retrieved for a given track:
ymin Lower boundary of the data.
ymax Upper boundary of the data.
(ymin + ymax)/2
ymax - ymin
height Height of the track, measured as the fraction of the distance between two neighbouring circles.
It is more suggested to directly use
TRACK_META to retrieve meta data for the current track.
A numeric value of the corresponding field.
# There is no example NULL
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