[Question] Does the topomap use the ica unmixing or mixing matrix?

Hey there,

I just debugged the ICA.plot_components() method and stumbled over the docstring in topomap.py#L778, where it says:

Project unmixing matrix on interpolated sensor topogrpahy.

But here the mixing matrix is used: topomap.py#L889.

Maybe this is some language or math understanding problem of mine. Could somebody clear this up and shortly explain how the topomap creation works inside?

Thanks in advance, paul

[jona-sassenhagen]

Hm … https://github.com/mne-tools/mne-python/blob/master/mne/viz/topomap.py#L889 should probably use ica.get_components now, for consistency’s sake.

[ppasler]

@mmagnuski thanks for the papers, they clear things up. So the mixing matrix is taken for plotting.