[Mne_analysis] reduce or downsample number of vertex locations in source space

[Tijmen Wartenberg]

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Hi,

I was wondering if there is a way to reduce the number of vertices in source space:
Currently, I use this:   src = op.join(fs_dir, 'bem', 'fsaverage-ico-5-src.fif').

This yields 20000 vertices. I would like to reduce the number of vertices, since it is a little overkill for what I want and it is too cpu heavy. Preferrably, I would like to perform the source modelling on ~5k points instead to save some computation time. Is there a supported option to do so or a trick to realize this?

Thanks,
Tijmen Wartenberg
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