I have an eeg data including events (spike) files. I want to epoch this eeg data into 2 seconds and perform classification. I did this process 2 months ago and when I classified the data I obtained, I achieved high success. However, I have lost this data now and I want to repeat the same process by applying filters. When I open the edf file in Brain Storm and epoch 2 s, the spike numbers in the data I get are different from the previous one and the classification success I get completely changes.
Then i epoched the data but always I get data with different number of spikes, altough I used the same data each time. Is there anyone who know what is the reason of that?