[Mne_analysis] writting raw fif files with mne_ex_read_write_raw

[Hari Bharadwaj]

Hi Avniel,
  Though derived using the temporal structure in the signals, ICA is
ultimately a static (i.e purely spatial) transformation. So how about
saving the ICA weights from the brain data and applying the same spatial
transformation to the empty room recordings?


Regards,
Hari

On Thu, April 21, 2011 2:46 pm, Ghuman, Avniel (NIH/NIMH) [F] wrote:
> Hi Matti,
>
> Good point. What would you suggest if we are using empty room noise to
> build the noise covariance matrix?
>
> Best Wishes,
> Avniel
>
>
> On 4/21/11 2:42 PM, "Matti Hamalainen" <msh at nmr.mgh.harvard.edu> wrote:
>
>
> On Apr 21, 2011, at 2:40 PM, sheraz at nmr.mgh.harvard.edu wrote:
>
> Dear All,
>
> In continuation of this current thread I have a question, when we do PCA
> we apply projection vector on the leadfield also.
>
> ICA is also spatial filtering, should not ICA spatial vector should also
> be applied to the Lead field.
>
>
> Hi,
>
> If the noise covariance is derived from the ICA-processed data, whitening
> automatically accounts for the dimension reduction caused by the ICA.
>
> - Matti
>
>
>
>
> ---------
>
> Matti Hamalainen, Ph.D.
> Athinoula A. Martinos Center for Biomedical Imaging
> Massachusetts General Hospital
>
> msh at nmr.mgh.harvard.edu
>
>
>
>
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-- 
Hari Bharadwaj