[FieldTrip] Two versions of matlab yield different output from runica

Roey Schurr roeysc at gmail.com
Thu Jul 16 10:15:26 CEST 2015

Dear Carmen,
have you tried running ft_componentanalysis twice on the same matlab? The
ICA algorithm has some intrinsic stochasticity in it, and therefore even
running it twice on one machine and one matlab version should yield similar
but not identical results.
I hope this is indeed the case, and that I'm not misleading you.

On Thu, Jul 16, 2015 at 11:05 AM, Carmen Kung <carmen.kung at mq.edu.au> wrote:

> Dear fellow fieldtrippers,
> A colleauge and I are analysing the same set of EEG data using the same
> fieldtrip toolbox (the version of 20150522) but we have different versions
> of matlab installed on each of our computer (mine is 2013b and hers is
> 2014b).  After running  ft_componentanalysis (using runica), we compared
> the output between us and we found that ft_componentanalysis yielded mostly
> the same components but still there are differences in ranking and the
> output.
> Does anyone know why this is the case and suggest which Matlab version we
> should use
> Many thanks in advance,
> Carmen
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