[Mne_analysis] Get back a reference channel from acticap

[Sylvain]

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Thanks Clemens!


On Wed, 17 Oct 2018 10:14:39 +0000
  "Brunner, Clemens 
(clemens.brunner at uni-graz.at)"	<clemens.brunner at uni-graz.at> wrote:
>        External Email - Use Caution        
> 
> Hi!
> 
> 
>> So in order to be clear in getting back FCz, referencing to average 
>>and then 
>> reducing dimensionality:
>> 
>> - first I add back FCz as a zeros channel;
> 
> Yes.
> 
>> - I compute the mean of each other channel and I substract 0 to this 
>>mean 
>> for FCz;
> 
> I'd say you compute the mean of all channels (which now include 
>FCz).
> 
>> - I then compute the average reference (will be rank deficient);
> 
> Yes.
> 
>> - I use the function mne.preprocessing.ICA specifying that 
>> I want max_pca_components and n_pca_components to be equal to my 
>>number of 
>> channel minus 1.
> 
> Yes.
> 
> Clemens
> 
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