[Eeglablist] How to make an ICA run in less than a week?

[James Schaeffer]

Hi All,


Thanks for your help.  I have started using binica and it is going a bit
faster.  We have chosen to use a high sampling rate (2048 Hz) because we
thought it might be needed for cross-frequency coupling analysis with high
gamma up to 200 Hz.  If I downsample, will I still be able to see these
relationships?


Thanks again,

James

On Thu, Jul 5, 2012 at 6:24 PM, James Schaeffer <schaefj3 at gmail.com> wrote:

> Dear eeglablist,
>
> I am running ICAs on 10 minutes of Biosemi EEG data, collected from 128
> channels, and sampled at 2048 Hz. However, the ICAs have been running for a
> few days without much progress. Two computers have 8G RAM and an Intel(R)
> Xeon(TM) CPU 2.80GHz. One has been running an ICA for 6 days and is on step
> 33; the other, for 4 days, and is on step 28. Another computer has 12G RAM
> and an Intel(R) Xeon(R) CPU 5110 @ 1.60GHz; it has been running for 3 days
> and is on step 60. All are running openSUSE 12.1 (x86_64), with eeglab
> version 10.2.2.4b. The 'free' command indicates that they are not using any
> swap space.  Should it be taking this long?  Is it possible that we have
> more than the one copy of the data in ram or that Matlab or Eeglab has
> placed something else in ram, or is busy with other processes? Is there
> anything I can do to speed up this process? Any help would be greatly
> appreciated.
>
> Thanks in advance,
> James
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20120713/7dff95a6/attachment.html>