Segmenting/Epoching/Interpolating Data

[Daniel-Gong]

Dear Daniel, thank you for building this package. I believe this is an important effort towards establishing a widely recognized python toolbox for eye-tracking analysis, just like we have had MNE-Python for EEG data analysis.

There are some functionalities that are still missing in the current release. For example:

• When parsing .asc file, trials should be able to be segmented based on START/END message. This has been implemented in other packages, e.g., [https://github.com/cran/eyelinker/blob/master/R/eyelink_parser.R]().
• Within any trial, data should be able to epoched around certain triggers, e.g., the Epochs class in MNE has this functionality: [https://mne.tools/stable/generated/mne.Epochs.html](). Also, to achieve this functionality, triggers should be able to be explicitly parsed when reading raw .asc file, like in [https://github.com/cran/eyelinker/blob/master/R/eyelink_parser.R]().
• When preprocessing data, interpolation should be included as an optional functionality to deal with blinks/tracking loss, e.g., [https://github.com/dmirman-zz/gazer/blob/12560f2e3405c4e22f8413bc6b1aa153a22f5021/R/interpolate_pupil.R#L1]().

[dkrako]

Dear Daniel-Gong, thank you very much for taking your time to write down some of the functionalities we are still missing in pymovements. eyelinker and MNE-python are definitely packages which we will consider as references in terms of the feature set which we want to provide.

Regarding the three functionalities:

1. We currently support parsing trial identifiers, although this is not well documented yet and we will create a comprehensive tutorial for this soon. Still, what's missing in pymovements is the automatic grouping according to the trial identifiers. Luckily this is very high on our priority list.
2. This is a great idea! I will dig deeper into MNE-python and figure out how to implement epoching exactly.
3. Yes, we plan on adding interpolation functionality in the future.

Thank you again for your feedback! I will keep you updated in this issue about the progress regarding your requests.