Dear all,
I have a problem with my ECG and EOG channels,
in the acquisition software the channels 61, 62 and 63 were not specified
as being EOG EOG and ECG channels. So they were recorded as being
"classical" EEG channels.
Now I'm trying to solve this issue. In raw.info[chs] I tried to change
"coil_type", "coord_frame" and "kind" values.
Then, when I plot the raw data, the channel 63 still does not look like the
classical ECG we usually observe.
Do you have any idea of what I should do to characterize my channels
61-62-63 as being EOG and ECG?
Thanks for your answer,
but actually it returns an error:
" File
"/home/bm243969/anaconda2/lib/python2.7/site-packages/mne/channels/channels.py",
line 196, in _check_set
% (ch['ch_name'], proj['desc']))
RuntimeError: Cannot change channel type for channel EEG061 in projector
"Average EEG reference"
Beno?t
2016-08-03 19:14 GMT+02:00 Mainak Jas <mainakjas at gmail.com>:
Dear Beno?t,
Have you tried raw.set_channel_types? Something like:
raw.set_channel_types({'EEG61': 'eog'})
should do the trick for you.
Mainak
Dear all,
I have a problem with my ECG and EOG channels,
in the acquisition software the channels 61, 62 and 63 were not specified
as being EOG EOG and ECG channels. So they were recorded as being
"classical" EEG channels.
Now I'm trying to solve this issue. In raw.info[chs] I tried to change
"coil_type", "coord_frame" and "kind" values.
Then, when I plot the raw data, the channel 63 still does not look like
the classical ECG we usually observe.
Do you have any idea of what I should do to characterize my channels
61-62-63 as being EOG and ECG?
Thanks a lot,
Beno?t
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Thanks for your answer,
but actually it returns an error:
" File
"/home/bm243969/anaconda2/lib/python2.7/site-packages/mne/channels/channels.py",
line 196, in _check_set
% (ch['ch_name'], proj['desc']))
RuntimeError: Cannot change channel type for channel EEG061 in projector
"Average EEG reference"
the EEG average ref proj has already been applied to your data. Use proj=False
somewhere or add_eeg_ref=False in read_raw_fif.
I added add_eeg_ref=False in read_raw_fif and then used
raw.set_channel_types.
It works well and after filtering my ECG channel it's way nicer.
It still doesn't look like a classical ECG and no correlation is found when
I do the ICA
(but it's ok for EOG).
I will have to remove components correlated to ECG manually.
Thanks for your help,
Beno?t
2016-08-04 11:35 GMT+02:00 Alexandre Gramfort <
alexandre.gramfort at telecom-paristech.fr>:
> Thanks for your answer,
> but actually it returns an error:
> " File
> "/home/bm243969/anaconda2/lib/python2.7/site-packages/mne/
channels/channels.py",
> line 196, in _check_set
> % (ch['ch_name'], proj['desc']))
>
> RuntimeError: Cannot change channel type for channel EEG061 in projector
> "Average EEG reference"
the EEG average ref proj has already been applied to your data. Use
proj=False
somewhere or add_eeg_ref=False in read_raw_fif.
The information in this e-mail is intended only for the person to whom it
is
addressed. If you believe this e-mail was sent to you in error and the
e-mail
contains patient information, please contact the Partners Compliance
HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in
error
but does not contain patient information, please contact the sender and
properly
dispose of the e-mail.