How to get cluster data after clustering in EEGLAB ?

Hello everyone

Hello everyone,I'm encountering some difficulties while analyzing EEG data using EEGLab. After clustering ICs using the K-means algorithm, I'm unsure about how to select meaningful clusters for further analysis.Specifically, I'd like to plot ERSPs for a chosen cluster (e.g., cluster 2) and then apply bootstrapping to the entire epoch. Subsequently, I want to set all non-significant ERSP values (p > 0.05) compared to this distribution to zero dB.

Answer 1

[Pratyush]

Hi Nguyen,

To analyze EEG data using EEGLab in MATLAB, follow these steps:

• Ensure your dataset and IC clusters are loaded with the 'STUDY' structure.
• Use 'std_erspplot' to compute ERSPs and obtain p-values for the selected cluster.
• Set ERSP values with p-values greater than 0.05 to zero dB.

   erspDataFiltered = erspData;
   erspDataFiltered(erspPvalues > 0.05) = 0;

• Use MATLAB plotting functions to visualize the filtered ERSP data.

This process helps in identifying meaningful clusters by focusing on significant ERSP changes.

[Kimizuka]

Sorry for the late reply. It was a great help for my problem.