hlpr_create_track_list: Process Track Data.frame
In kueckelj/celltracer: An Analysis-Toolbox for High-Throughput Cell Imaging Data

Filters the whole track data frame into it's phase-subparts and recomputes the variable dfo (= Distance from origin) if the filtered part does not belong to the phase 'before_tmt'.

To be used as input for .f in purrr::map() inside the function compileCto().

1	hlpr_create_track_list(phase, track_df)

phase

Character value. Refers to the phase of the experiment. Valid inputs are:

'before_tmt': Uses the data that refers to the time before the treatment.
'first_tmt': Uses the data that refers tot the time after the treatment.

Note: This argument is ignored if the experiment set up did not include any treatment or the treatment started right from the beginning.

track_df

A data.frame in which each observation refers to a cell at a given frame and that contains the following variables:

cell_id: Character. Refers to the cell id's.
x_coords: Numeric. Refers to the cell's x-coordinates.
y_coords: Numeric. Refers to the cell's y-coordinates.
dfo: Numeric. The distances from the first position tracked. (Distance from origin).
dfpl: Numeric. The distances from the last point.
speed: Numeric. Refers to the instantaneuous speed.
afo: Numeric. The angle from the position of origin.
aflp: Numeric. The angle from the last position.
frame_num: Numeric. The frame number the observation refers to.
frame_time: Numeric. The frame number multiplied with the interval between two frames
frame_itvl: Character. The frame time combined with the intervals unit