Hi Amir,
You can use montage and erase the line corresponding to the channel
you want to remove.
Vladimir
On Mon, Apr 5, 2010 at 7:54 PM, Amir H Javadi <[log in to unmask]> wrote:
> Hello again
> Sorry for my previous post. I've just realised that the file sizes are
> reasonable. It seems it takes a long time for Mac to refresh the file sizes.
> Now I have another question. How can I remove a channel from the data file?
> Have a good time :-)
> Amir
>
>
>
>
> On 5 April 2010 16:13, Amir H Javadi <[log in to unmask]> wrote:
>>
>> Hi :-)
>> I have a set of EMG data which I want to use SPM methods to analyse. I
>> recorded just the external channels. I specify my desired channels as below
>> in the spm_eeg_convert method
>>
>> S.channels = {'EXG1', 'EXG2', 'EXG3', 'EXG4', 'EXG5', 'EXG6', 'EXG7',
>> 'Status'};
>>
>> Interestingly the output file is as huge as the source file. I couldn't
>> prevent the recorder from recording other EEG data and the raw data file is
>> about 800MB. The converted SPM file is also almost the same size which shows
>> that it still allocated the space for unwanted channels. How can I free
>> those allocated spaces? When I view the resultant converted file, it just
>> gives me 7 channels and 'status'. Very many thanks :-)
>>
>> I've just updated my SPM to ensure that it is not a fixed bug.
>>
>> Have a good time :-)
>>
>> Amir
>>
>
>
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