brainbox.behavior.dlc

Set of functions to deal with dlc data.

Functions

get_dlc_everything	Get out features of interest for dlc
get_feature_event_times	Detect events from the dlc traces.
get_licks	Compute lick times from the tongue dlc points
get_pupil_diameter	Estimates pupil diameter by taking median of different computations.
get_smooth_pupil_diameter
get_sniffs	Compute sniff times from the nose tip
get_speed	FIXME Document and add unit test!
get_speed_for_features	Wrapper to compute speed for a number of dlc features and add them to dlc table
insert_idx
likelihood_threshold	Set dlc points with likelihood less than threshold to nan.
plot_lick_hist	Plots histogramm of lick events aligned to feedback time, separate for correct and incorrect trials
plot_lick_raster	Plots lick raster for correct trials
plot_motion_energy_hist	Plots mean motion energy of given cameras, aligned to stimulus onset.
plot_pupil_diameter_hist	Plots histogram of pupil diameter aligned to simulus onset and feedback time.
plot_speed_hist	Plots speed histogram of a given dlc feature, aligned to stimulus onset, separate for correct and incorrect trials
plot_trace_on_frame	Plots dlc traces as scatter plots on a frame of the video.
plot_wheel_position	Plots wheel position across trials, color by which side was chosen
plt_window

plt_window(x)

insert_idx(array, values)

likelihood_threshold(dlc, threshold=0.9)

Set dlc points with likelihood less than threshold to nan.

FIXME Add unit test.

Parameters:

• dlc – dlc pqt object

• threshold – likelihood threshold

Returns:

get_speed(dlc, dlc_t, camera, feature='paw_r')

FIXME Document and add unit test!

Parameters:

• dlc – dlc pqt table

• dlc_t – dlc time points

• camera – camera type e.g ‘left’, ‘right’, ‘body’

• feature – dlc feature to compute speed over

Returns:

get_speed_for_features(dlc, dlc_t, camera, features=['paw_r', 'paw_l', 'nose_tip'])

Wrapper to compute speed for a number of dlc features and add them to dlc table

Parameters:

• dlc – dlc pqt table

• dlc_t – dlc time points

• camera – camera type e.g ‘left’, ‘right’, ‘body’

• features – dlc features to compute speed for

Returns:

get_feature_event_times(dlc, dlc_t, features)

Detect events from the dlc traces. Based on the standard deviation between frames

Parameters:

• dlc – dlc pqt table

• dlc_t – dlc times

• features – features to consider

Returns:

get_licks(dlc, dlc_t)

Compute lick times from the tongue dlc points

Parameters:

• dlc – dlc pqt table

• dlc_t – dlc times

Returns:

get_sniffs(dlc, dlc_t)

Compute sniff times from the nose tip

Parameters:

• dlc – dlc pqt table

• dlc_t – dlc times

Returns:

get_dlc_everything(dlc_cam, camera)

Get out features of interest for dlc

Parameters:

• dlc_cam – dlc object

• camera – camera type e.g ‘left’, ‘right’

Returns:

get_pupil_diameter(dlc)

Estimates pupil diameter by taking median of different computations.

The two most straightforward estimates: d1 = top - bottom, d2 = left - right In addition, assume the pupil is a circle and estimate diameter from other pairs of points

Parameters:

dlc – dlc pqt table with pupil estimates, should be likelihood thresholded (e.g. at 0.9)

Returns:

np.array, pupil diameter estimate for each time point, shape (n_frames,)

get_smooth_pupil_diameter(diameter_raw, camera, std_thresh=5, nan_thresh=1)

Parameters:

• diameter_raw – np.array, raw pupil diameters, calculated from (thresholded) dlc traces

• camera – str (‘left’, ‘right’), which camera to run the smoothing for

• std_thresh – threshold (in standard deviations) beyond which a point is labeled as an outlier

• nan_thresh – threshold (in seconds) above which we will not interpolate nans, but keep them (for long stretches interpolation may not be appropriate)

Returns:

plot_trace_on_frame(frame, dlc_df, cam)

Plots dlc traces as scatter plots on a frame of the video. For left and right video also plots whisker pad and eye and tongue zoom.

Parameters:

• frame – np.array, single video frame to plot on

• dlc_df – pd.Dataframe, dlc traces with _x, _y and _likelihood info for each trace

• cam – str, which camera to process (‘left’, ‘right’, ‘body’)

Returns:

matplolib.axis

plot_wheel_position(wheel_position, wheel_time, trials_df)

Plots wheel position across trials, color by which side was chosen

Parameters:

• wheel_position – np.array, interpolated wheel position

• wheel_time – np.array, interpolated wheel timestamps

• trials_df – pd.DataFrame, with column ‘stimOn_times’ (time of stimulus onset times for each trial)

Returns:

matplotlib.axis

plot_lick_hist(lick_times, trials_df)

Plots histogramm of lick events aligned to feedback time, separate for correct and incorrect trials

Parameters:

• lick_times – np.array, timestamps of lick events

• trials_df – pd.DataFrame, with column ‘feedback_times’ (time of feedback for each trial) and ‘feedbackType’ (1 for correct, -1 for incorrect trials)

Returns:

matplotlib axis

plot_lick_raster(lick_times, trials_df)

Plots lick raster for correct trials

Parameters:

• lick_times – np.array, timestamps of lick events

• trials_df – pd.DataFrame, with column ‘feedback_times’ (time of feedback for each trial) and feedbackType (1 for correct, -1 for incorrect trials)

Returns:

matplotlib.axis

plot_motion_energy_hist(camera_dict, trials_df)

Plots mean motion energy of given cameras, aligned to stimulus onset.

Parameters:

• camera_dict – dict, one key for each camera to be plotted (e.g. ‘left’), value is another dict with items ‘motion_energy’ (np.array, motion energy calculated from this camera) and ‘times’ (np.array, camera timestamps)

• trials_df – pd.DataFrame, with column ‘stimOn_times’ (time of stimulus onset for each trial)

Returns:

matplotlib.axis

plot_speed_hist(dlc_df, cam_times, trials_df, feature='paw_r', cam='left', legend=True)

Plots speed histogram of a given dlc feature, aligned to stimulus onset, separate for correct and incorrect trials

Parameters:

• dlc_df – pd.Dataframe, dlc traces with _x, _y and _likelihood info for each trace

• cam_times – np.array, camera timestamps

• trials_df – pd.DataFrame, with column ‘stimOn_times’ (time of stimulus onset for each trial)

• feature – str, feature with trace in dlc_df for which to plot speed hist, default is ‘paw_r’

• cam – str, camera to use (‘body’, ‘left’, ‘right’) default is ‘left’

• legend – bool, whether to add legend to the plot, default is True

Returns:

matplotlib.axis

plot_pupil_diameter_hist(pupil_diameter, cam_times, trials_df, cam='left')

Plots histogram of pupil diameter aligned to simulus onset and feedback time.

Parameters:

• pupil_diameter – np.array, (smoothed) pupil diameter estimate

• cam_times – np.array, camera timestamps

• trials_df – pd.DataFrame, with column ‘stimOn_times’ (time of stimulus onset for each trial) and feedback_times (time of feedback for each trial)

• cam – str, camera to use (‘body’, ‘left’, ‘right’) default is ‘left’

Returns:

matplotlib.axis