Spherical spline interpolation to use subject data on template head model

[Sarah]

I used plot_alignment to see the electrode positions but the first are on the sample subject and the one on which I want to interpolate are on the fsaverage subject, so I am not sure how to visualize that.

Here are the topography before and after spherical spline interpolation, at the time of the P100 for visual right stimuli (with default parameters of the function except for the time of visualisation).

Before interpolation :

After interpolation :

Thank you !