Extracting data quality measures from raw gaze data

[romajaku]

Description of the problem

There is a need for more precise data quality measures to be extracted from a data frame of raw data. This should include such measures as:

• proportion of data loss: proportion of missing values, proportion of pupil loss both for individual trials and globally per participant
• proportion of unclassified gaze events (neither saccades, nor fixations)
• average ratio of samples on non-AOIs vs. on AOIs over all sessions
  These measures will be saved as a csv file and used by Filter Interface and EyeStore

Description of a solution

• A function will be added to gaze (probably) that takes a data frame calculates the relevant measures.
• The function will return a dictionary of measure names and values.
• Maybe it'll save it as a csv file

Minimum acceptance criteria

Since the measures involving AOIs cannot be implemented before AOIs are properly extracted, I think maybe it would make sense to close the ticket once we have the proportion of data loss measured.