MNE-Python version: 0.22.0 operating system: linux Hey guys, I’m wondering if there is a way to average epochs which is duplicate (the duplicated epochs have exactly the same event id) because, in my experiment, all the trials/pictures were repeated twice. [image] After epoching, I used the au…

[image] YuZhou: Is there a way or function to average epochs with the same event id? Yes, simply select the epochs you wish to average by name, and then average them: evoked_cow = epochs['ab/cow'].average()

Hi! Richard, Thank you very much for your reply. I have lots of duplicate trials, and I found some code in the tutorial to average them in a for loop: evokeds = dict() query = 'event_name == {}' for eve_name in epos_pic_corr.metadata['event_name'].unique(): evokeds[str(eve_name)] = epos_pic_co…

[image] YuZhou: My question is the evokeds object created above already didn’t have the metadata like epochs have, right? I cannot query or select evoked data based on the metadata anymore, right? Yes, the metadata gets lost when you average epochs. The problem here is that it would be diffic…

I mainly have two goals, the first is to do the linear discriminant analysis at the sensor level. In my experiment, each picture was presented twice to increase the signal-to-noise ratio, so at first, I thought I should average the epochs with the same event name, and also, I modified the metadata o…

try something like this labels = pd.factorize(epochs.metadata['feature_color']) or maybe labels = epochs.metadata['feature_color'] could even work Alex

Hi! Alex, Thanks a lot for your suggestions :blush: both worked perfectly fine :+1: and I’m using the latter to try to do the LDA.

please share a full script from imports to the crash. you can share .zip or dropbox folder or anything that allows to replicate the pb with: python run_script.py Alex

@YuZhou I have moved your question to a new topic. Please always open a separate topic for new questions.

Okay, sure, thanks a lot. I will pay attention next time :relaxed:

How to average epochs with the same event id

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How to average epochs with the same event id

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