how to use the regression-based correction method on multiple channels

[richard (Richard Höchenberger)]

Hello @Huizhong and welcomt to the forum!

Your code is hard to read because it’s not formatted properly; could you please edit your posting and format your Python code as “Preformatted text”? This posting describes how to do it:

How to correctly format your question

If you have a question or issue with MNE-Python, please include the following info: MNE version: e.g. 1.6.0 Operating system: e.g. macOS 13 / Windows 10 / Ubuntu 22.04 Always provide relevant code snippets – ideally a minimal working example (MWE). Make sure to format your code correctly with the Preformatted text toolbar button </>. Do not share screenshots of code and error messages (use preformatted text instead).

Thanks!

Richard