Pick channels using regular expression.
Returns the indices of the good channels in ch_names.
See also
Examples
>>> pick_channels_regexp(['MEG 2331', 'MEG 2332', 'MEG 2333'], 'MEG ...1')
[0]
>>> pick_channels_regexp(['MEG 2331', 'MEG 2332', 'MEG 2333'], 'MEG *')
[0, 1, 2]
mne.pick_channels_regexp
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