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Merge Fixations from I DT Classifier
merge_fixations_idt R Documentation
Merge fixations classified by classify_idt into a new, combined
fixation when they are closer to each other than the max time and the
max dispersion specified is not exceeded.
merge_fixations_idt(data, max_time = 75, dispersion_threshold = 1.6)
data Data frame of the eye tracking data we want to process
max_time Max time between fixations in ms
dispersion_threshold Dispersion threshold for the combined fixation in degrees
Input data frame columns
gazeorigin_x
: X coordinates of the gaze origin
gazeorigin_y
: Y coordinates of the gaze origin
gazeorigin_z
: Z coordinates of the gaze origin
gazePoint_x
: X coordinates of the gaze point
gazePoint_y
: Y coordinates of the gaze point
gazePoint_z
: Z coordinates of the gaze point
classification
: Classification of this gaze point
eventIndex
: Index of the event in which the gaze point lies
eventType
: Type of the current event
eventDuration
: Duration of the current event
fixation_x
: X coordinate of the current fixation
fixation_y
: Y coordinate of the current fixation
fixation_z
: Z coordinate of the current fixation
This is a custom implementation for merging fixations on the same AOI
with a gap smaller than the specified time between them. It is intended
to be used together with the I-DT algorithm described by Llanes-Jurado
et al. (2020, doi:10.3390/s20174956)
and as implemented in classify_idt.
The input data frame with the fixations merged