This class is used to manipulate and represent the position data of the animal. The first data point is at time resSamplesPerWhlSample and not 0. The data are usually loaded from .whd, .res_samples_per_whl_sample, .sampling_rate_dat and .px_per_cm
The position data likely come from a tracking system (e.g. positrack) in which the y-axis has its origin at the top-left of the screen. In contrast, most plotting functions in R have the y-axis origin at the bottom-left of the screen. This is important to know if you want to find out where landmarks relative to the animal.
session
A character vector containing the names of the recording session.
path
The directory in which the files of the session are located.
pxPerCm
Pixels per centimeter in the x and y position data.
samplingRateDat
Sampling rate of the .dat files in this recording session
resSamplesPerWhlSample
Number of samples in the .dat files between each position values.
xWhl
A numeric vector containing x data loaded from the .whl file.
yWhl
A numeric vector containing y data loaded from the .whl file.
hdWhd
A numeric vector containing the head direction of the animal, loaded from .whd file.
x
x position of the animal in cm
y
y position of the animal in cm
hd
Head direction of the animal
lin
Linearized position of the animal. Used for linear track data.
dir
Direction in the linearized position data (0 or 1)
speed
Linear speed in cm per sec
angularSpeed
Angular speed in degrees per sec
res
Sample number associated with each position value
defaultXYSmoothing
Default smoothing apply to the x and y position.
minShiftMs
Minimum shift of the position vector during a shuffling procedure
percentInvalidPosition
Percentage of data points with invalid position
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