Getting a strange time when trying to create epochs with fixed length

💬 Support & Discussions
,
1

Hello!
I am trying to create epochs with fixed length and then store the data in a dataframe.
When storing the data in DF I get a column ‘Time’ with -200,-196,-192… and so on with step ‘4’ , thougt I try to set different times (e.g., 20 s, 0.2) - this ‘4-step’ never changes.
I guess I am wrong with understanding some hidden parameters.

My code snippet looks like this:

events_array = mne.make_fixed_length_events(raw, duration=0.20)
epochs = mne.Epochs(raw, events_array)

MNE version: 0.24.1

Thank you for any help!

2

use to_dataframe(..., time_format=None) to get time in seconds. What you’re currently seeing is time rounded to the nearest integer number of milliseconds. Note that the default behavior will switch from 'ms' to None in the next release.