[Mne_analysis] Pick a channel from the epoch data?

[Maria Hakonen]

Hi,

I tried that as:
epochs_condition_1.pick_channels(['MEG 0242'])

but got an error:

----> 1 epochs_condition_1.pick_channels(['MEG 0242'])

/home/mhhakone/Downloads/mne-python/mne/channels.pyc in pick_channels(self,
ch_names, copy)
    148
    149         idx = [inst.ch_names.index(c) for c in ch_names if c in
inst.ch_names]
--> 150         inst._pick_drop_channels(idx)
    151
    152         return inst

/home/mhhakone/Downloads/mne-python/mne/channels.pyc in
_pick_drop_channels(self, idx)
    187
    188         if inst_has('picks'):
--> 189             self.picks = self.picks[idx]
    190
    191         if inst_has('cals'):

IndexError: index 22 out of bounds 0<=index<0

Could someone please let me know what I am doing wrong?

epochs_condition_1 is:

epochs_condition_1
Out[40]: <Epochs  |  n_events : 160 (all good), tmin : -0.0999936018905
(s), tmax : 0.999936018905 (s), baseline : (-0.09999360144138336, 0.0)>

Thanks,
Maria

2014-10-27 17:02 GMT+02:00 Laetitia Grabot <laetitia.grabot at gmail.com>:

> Hi,
> There is a method that you can apply to your epochs object to select a
> channel:
> epochs.pick_channels()
>
> Laetitia
>
> 2014-10-27 15:52 GMT+01:00 Maria Hakonen <maria.hakonen at gmail.com>:
>
>> Hi,
>>
>> I have loaded epochs with mne.read_epochs and would need to pick a
>> channel from the epoch data. I wonder if there is any function to do this?
>> mne.pick_channels_evoked seems to work for evoked data, but I haven't found
>> the corresponding function for epochs.
>>
>> Thanks,
>> Maria
>>
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