Can I plot a channel averaged TRF function rather than a single channel TRF function?

[Tang19999991]

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. Function name [e.g. mTRFtrain]
2. Input data size and type [e.g. stim=10×1 cell array (each cell=1000×10 matrix)]
3. Input data contains '...' [e.g. NaNs, Infs, complex numbers]
4. Additional parameter values [e.g. 'dim'=2]

Expected behavior A clear and concise description of what you expected to happen.

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Software: [e.g. MATLAB]
• Version [e.g. R2019b]

Additional context Add any other context about the problem here.