Dear Steve,
This plot is from higher-level temporal concatentation, but tensor-ICA
gives more or less the same EVplot.
Steven
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On
Behalf Of Steve Smith
Sent: donderdag 14 februari 2008 9:39
To: [log in to unmask]
Subject: Re: [FSL] strange Group ICA dimensional estimate
Hi - which ICA option were you running - higher-level temporal
concatentation or tensor ICA?
This does indeed look strange....
Cheers, Steve.
On 8 Feb 2008, at 08:02, H.Steven Scholte wrote:
> Dear FSL experts,
>
> I have used MELODIC for PICA analysis on a between&within subject
> design.
> All seems to work great but the resulting EVplot (see attachment)
> worries
> me. Instead of getting a clear peak in the 'dim. explained' i get a
> funny
> line. Also, the eigenvalues drop dramatically after 5 components and
> do not
> show the characteristic curve. As you can see the dataset is rather
> large
> (121 runs of 400 volumes).
>
> Does the attached image look OK or is there something strange going
> on?
>
> Steven
>
> <EVplot.png>
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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