olafhauk
January 14, 2021, 3:13pm
1
Iām sure Iāve been able to pick MEG sensor groups from Vectorview data (āleft-temporalā, āright-frontalā etc) before, but I cannot find it any more. Any quick tips?
Thanks,
Olaf
richard
January 14, 2021, 4:01pm
2
You mean in raw.plot()? I believe raw.plot(group_by='selection') should do what you want.
olafhauk
January 14, 2021, 4:24pm
3
I was too brief. I would like to pick channels (names or indices) for MEG sensor groups (basically like labels in source space).
richard
January 14, 2021, 4:33pm
4
I donāt know of any public function to do so. Thereās a private function that should do what you want though:
raise ValueError('No match for selection name "%s" found' % n)
# make the selection a sorted list with unique elements
sel = list(set(sel))
sel.sort()
if spacing == 'new': # "new" or "old" by now, "old" is default
sel = [s.replace('MEG ', 'MEG') for s in sel]
return sel
def _divide_to_regions(info, add_stim=True):
"""Divide channels to regions by positions."""
from scipy.stats import zscore
picks = _pick_data_channels(info, exclude=[])
chs_in_lobe = len(picks) // 4
pos = np.array([ch['loc'][:3] for ch in info['chs']])
x, y, z = pos.T
frontal = picks[np.argsort(y[picks])[-chs_in_lobe:]]
picks = np.setdiff1d(picks, frontal)
@agramfort we should have a public API for thisā¦
olafhauk
January 14, 2021, 5:43pm
5
Thanks. I think mne.selection.read_selection is what I remembered
richard
January 14, 2021, 7:09pm
6
olafhauk:
read_selection
Oh, right thatās perfect!mne namespace, i.e., mne.read_selection().
agramfort
January 14, 2021, 8:11pm
7
you also have a selection parameter in mne.pick_types
Alex
richard
January 14, 2021, 9:09pm
8
But that would serve a different purpose, unless Iām mistaken? @olafhauk wanted to select channels based on location, whereas mne.pick_typesās selection parameter simply restricts the picked channels to a provided list of channel names ā but doesnāt help with finding out where on the head these channels are located. Am I missing something?
agramfort
January 15, 2021, 8:08am
9
indeed. You are right @richard
my bad
Alex
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