[Eeglablist] Regarding slow ICA

Narendra Kumar narendra.linguistics at gmail.com
Sat Aug 26 07:53:04 PDT 2017

I observed the differences between the two in command window as follows:

When files run in 3-3.5 hrs

Beginning ICA training ... first training step may be slow ...

step 1 - lrate 0.00100 wchange ***** angledelta 0.0 deg

step 2 - ......

When files take more than 20 hours

Beginning ICA training ... first training step may be slow ...
Warning: Using 'state' to set RAND's internal state causes RAND, RANDI, and
RANDN to use legacy random number generators.  This syntax will be
removed in a future release.  See Updating Your Random Number Generator
Syntax to use RNG to replace the old syntax.
> In runica at 830
  In pop_runica at 419
  In preprocessing_1_30 at 131
Lowering learning rate to 0.0009 and starting again.

Lowering  learning rate to .....

​I think the error can tell about it in a better way.


On Sat, Aug 26, 2017 at 8:14 PM, Narendra Kumar <narendra.linguistics at gmail.
com> wrote:

> Dear EEGLAB List users,
> I run ICA on 25 subjects data using script for multiple subjects data
> (pop_runica(EEG, 'extended', 1, 'interupt', 'off')). Till 13 subjects, it
> took 3.5 hours for each data file, but after then the next data file has
> been running for last more than 20 hours.
> Kindly tell me the reason for this and suggest a solution ? I'll be
> thankful to you for this.
> Regards,
> Narendra
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