[Eeglablist] ICA speed

[Scott Makeig]

Hecke,

How many training steps before ICA converges (stops)? Is it successful (e.g.,
do many of the component maps look simple/dipolar (= like projections of a
dipole in the brain)?

Scott Makeig

On 1/31/07, Hecke <hecke at nld.ds.mpg.de> wrote:
>
> Hi all,
>
> I'm interested in an average running speed of the ICA decomposition.
>
> EEG = pop_runica( EEG, 'icatype', 'runica', 'dataset', CURRENTSET, ...
>                       'extended', 1, 'verbose', 'on');
>
> takes about several hours while using a dataset of 63 electrodes an a
> recording time of approx. 45 minutes. I already resampled the data from
> 5000Hz to 500Hz, but ICA is not remarkably faster.
> It is running on a 64bit Opteron at 2.4 GHz with 32 GB Ram...
>
> Is this normal? Or do I make some mistakes?
>
> thanx
>         Hecke
>
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-- 
Scott Makeig, Director and Research Scientist, Swartz Center for
Computational Neuroscience, Institute for Neural Computation, University of
California San Diego, La Jolla CA 92093-0961, http://sccn.ucsd.edu/~scott
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